Is Your Partner Cheating? 21 Ways You Can Tell

There are 21 major areas you should be concerned with if you think your partner might be cheating, or if you feel he or she is on the verge of having an affair. These 21 areas of interest correspond to the 21 major categories of infidelity signs covered in Is He Cheating on You - 829 Telltale Signs by infidelity expert Ruth Houston, who is also the founder of InfidelityAdvice.com. These 21 areas of concern apply to both cheating women and cheating men.

PHYSICAL APPEARANCE - A cheating partner will express a sudden desire to look more attractive. He or she will begin enhancing or upgrading their appearance in a number of ways. So if your partner suddenly embarks on a drastic makeover, it's probably to impress someone other than you. There are at least 76 different changes in wardrobe, grooming habits, and personal hygiene which indicate that your partner could be having an affair.

HOW YOUR PARTNER RELATES TO YOU - Your partner's involvement with another lover will cause him or her to treat you differently -- even subconsciously- in over 70 different ways. If you know what to look for, this is one area where you can spot signs of infidelity that even a private investigator might overlook.

CONVERSATIONAL CLUES - What a cheating partner chooses or refuses to talk about can alert you that he or she is having an extramarital affair. New people, places or things suddenly become a part of their conversation, while the usual ones are no longer talked about. There are 70 conversational clues you can listen for that will give you valuable information about your partner's affair.

WORK HABITS - Cheating partners often use work-related excuses to account for large blocks of time away from home. Working late is the most common cover for an affair. A change in your partner's work habits could also indicate that he or she is involved in a workplace affair, so familiarize yourself with the 39 work-related telltale signs.

DAY-TO-DAY BEHAVIOR - Everyone has a regular routine they usually follow each day. A cheating partner will often display dozens of the 92 different kinds of deviations from their normal pattern of behavior. These deviations are important telltale signs.

FINANCIAL AFFAIRS - Affairs cost money. A cheating partner will wine and dine their new love interest, entertain them and buy them gifts. This will usually be reflected in their disposable income and the amount of money they're now able to spend on you. These are just a few of the 52 financially-related telltale signs.

TRAVEL - Travel gives a cheating partner an opportunity to cheat far from the sight of prying eyes. There are 27 travel-related signs of infidelity including bogus business trips and legitimate business travel that combines a little pleasure on the side. If your partner's trips begin to occur more frequently or last longer than before, it could be an important telltale sign.

PERSONALITY OR BEHAVIORAL CHANGES - If your partner is cheating, there will be noticeable changes in his or her attitude, personality or behavior. Knowing what to look for is the key. Ranging from drastic to subtle, there are 36 changes of this type which can indicate the existence of an affair.

ABSENCES - Affairs usually require an investment of time. A cheating partner's absences will become noticeable in 39 different ways, as they steal time from other activities to spend with their new lover.

TELEPHONE TIP-OFFS - Affairs depend on repeated contact; much of which is done by phone. Countless cheating partners have been exposed by one or more of the 76 telephone tip-offs of infidelity.

CAR CLUES - A cheating partner's car can contain a wealth of telltale signs. If you know what to look for, there are at least 40 signs of infidelity, to be found in various areas of your partner's car. Check the glove compartment, car seats, tire well, visor, ashtray, floor mats and other nooks and crannies.

SEX - Changes of any kind in the frequency or quality of your sex life together can be indicative of an affair. If you spot one of the 37 sex-related signs of infidelity, make sure you're practicing safe sex. Don't put yourself at risk for HIV/AIDS and other sexually- transmitted diseases.

EATING HABITS - A cheating partner's eating habits can be heavily influenced or affected by his or her lover in 31 different ways. Yet, this is the most overlooked category of telltale signs. A cheating partner may develop a preference for the type of food their lover eats, or the kind of restaurants where their lover likes to dine.

SMELLS AND TASTES - Each person has a unique smell or taste, which often goes unnoticed until it's replaced with something else. There are at least 21 signs of infidelity associated with your sense of smell or taste. Your partner's kisses may taste different, o there may be unfamiliar odors on their body or clothing.

INVASION OF YOUR HOME - It's not uncommon for a cheating partner to invite his or her new lover to their home. And the lover may inadvertently, or even deliberately, leave personal items behind. At least 22 different signs of infidelity could turn up in various areas of your home if your partner's new lover has been there while you were away.

GIFTS - Be alert around the times of the year when gifts are usually exchanged -- especially Christmas or Valentine's Day. If you know what to look for, you can find any of 19 gift-related signs of infidelity, including incriminating receipts and credit card bills.

COMPUTER USE - A cheating partner will often use the computer to seek out new partners or to communicate with their new lover behind your back. Finding several of the 30 computer-related signs of infidelity could also indicate that your partner is having an online or internet affair.

CELL PHONES AND PAGERS - Cell phones make it easier for a cheating partner to conceal his or her affair. But they also make it easier for the cheater to get caught. If your partner is using a cell phone, pager or similar device to communicate with their new lover, the affair can be exposed in 28 different ways.

PHYSICAL EVIDENCE - Many times you can find physical proof of infidelity among a cheating partner's personal effects. Check pockets, purses, wallets, desk or dresser drawers, closets, tool boxes, jewelry cases or other personal possessions for signs of infidelity. You'll be surprised at how many of the 32 kinds of physical evidence you can find.

THEIR BEHAVIOR AROUND SAME SEX FRIENDS - Studies show that a cheater is more likely to have an ongoing affair with someone he or she already knows -- a neighbor, co-worker, business associate or mutual friend. If this is the case with your partner, their behavior around each other will give them away. There are 71 signs of infidelity in this category, that can reveal the identity of your cheating partner's new love.

ACCIDENTAL SLIPS-UPS OR DISCLOSURES - There are 57 kinds of slip-ups or disclosures that could accidentally expose a cheating partner. Even a slip of the tongue on the part of the cheater or someone he or she knows, could inadvertently expose the affair.

KNOW WHAT TO LOOK FOR - If you're not sure what specific signs to look for in each of the 21 areas mentioned above, a good infidelity reference book can help. There are many infidelity books on the market, but Is He Cheating on You? - 829 Telltale Signs is the only one that lists practically every known sign of infidelity, including the subtle signs people usually overlook. There's an entire chapter devoted to each of the 21 categories of infidelity signs. So if your partner is cheating, or on the verge of having an affair, you don't have to be the last one to know.