Sex is definitely more exciting with an affair. There is a newness and excitement with the taboo of forbidden sex. This sexually charged state can result in your lover wanting to have sex all the time. It’s also possible that your lover will increase their sex with you to hide the fact that they are getting sex elsewhere. It’s also common for a cheater to become more attentive during sex when they are cheating. This is done to try and mask the fact that their attention is actually elsewhere. Take note if your sex suddenly becomes more adventurous, with your partner pushing you to try new things they had no interest in before. Therefore, this means that an increase of sex is not a definitive indicator of sex. It’s just a sign that something might be going on.