It is actually possible to determine someone's character by their Zodiac signs. Zodiac sign of a person reveals their personality and tendency to flirt around. If you are worried your partner might cheat, here are a few clues to know:-
Aries
Aries will cheat whenever required. They belong to the category of excitement oriented people. They want attention, and fill the big ego they possess. They are very much self-esteemed kind of people. If their partner is unfaithful to them, they will definitely cheat on him, more out of ego than the feeling of revenge. They are very hardworking and ambitious people. f you want to keep your partner on track, then shower them with a lot of attention, physical affection.
Taurus
Taurus is a very loyal sign, so they would most likely only be tempted to cheat if they suspected their partner was not equally loyal. That said, Taurus is also a very sensual and could be tempted to stray for the pure pleasure of it. Keep your Taurus happy by showing how much you care, both physically and emotionally.
Gemini
A Gemini is attracted towards those who stimulate him or her intellectually. Physical attraction and lust usually take a backseat with them. However, if you allow your Gemini partner to feel neglected and lonely, they would look for contentment outside the relationship. So, apart from spending quality time with them, keep them hooked with intellectually stirring conversations.
Cancer
They are emotional and sensitive, and hence most unlikely to cheat. Finding cheaters in this sign, is indeed a rare case. Having said that, it is their low self-esteem and very impressionable mind, which might make them crawl out on you. Just keep reassuring them of your love and this is enough to keep them hooked to you.
Leo
They are highly self-esteemed. They always need to be the only centre of attraction. They are attention seekers and do everything to become the central attention. So Leo native will put himself or herself in the first place in any situation or any case. To keep your Leo partner loyal then you keep boosting their ego time and again.
Virgo
Virgo is a serious sign and these individuals can sometimes be too hard on themselves, but it's also typically a very grounded and loyal earth sign. That said, if your Virgo becomes frustrated because they don't feel you are giving them enough or you are being too critical of them, they may become overly critical of you, too, and cheat on their way to finding someone new. Let your Virgo know you love them just the way they are and you'll get a loyal, loving partner in return.
Libra
They can be unfaithful but only if they are feeling neglected. Their need for love and delight is stronger than anything, so if you forget them, they are likely to be tempted to go look elsewhere for affection. Fortunately, their need of stability and harmony within a relationship pushes them to think twice before doing something irredeemable.
Scorpios
Scorpios are well known for being ruthless, manipulative, and self-serving. It is one of the signs that is most known for cheating. Scorpios are also famous for being vengeful, possessive, and jealous and many of them can carry a grudge or be a complete thorn in your side for years and years.
Sagittarius
Sagittarians constantly wonder if there can be more excitement and adventure in life. These people try to flirt innocently, but might get carried away to more serious types of cheating. However, they will not cheat if you keep them stimulated, share their love for adventure, and do not try to trample their freedom.
Capricorn
Calm, cool and collected Capricorns most often make loyal lovers, as they have the discipline and control to stop themselves from cheating - even if strongly tempted. But Caps do demand respect and admiration from their partners, and this goat will wander off if you don't do your best to let them know how amazing they are.
Aquarius
Aquarius is again one of those signs that is more likely to have an emotional affair, than a physical one. They need attention, but do know how to restrain themselves from seeking physical pleasures outside a committed relationship. They might not be one of the most romantic signs, but they desire love and importance from their partner. Remember, this is also one of the most unpredictable signs, so keep things unpredictable for them if you want to keep them honest and loyal.
Pisces
These guys are extremely faithful and strongly attached to their partner. they are true lovers. They only need to be with their other half. Pay attention because they can let themselves be influenced by a captivating encounter and finish by losing themselves in an emotional whirlwind.