Exactly! Be very, very careful answering questions like this. Don't LOOK FOR cheating, just pay close attention to signs that might show it for sure. It's a natural tendency when you get this question to start viewing the cards with an eye to seeing cheating and when you do it that way, you'll see it by mistake. You get what you look for sometimes, even if it's not there. Your mind just starts trying to make the cards fit the presumption. I'm not saying you'd maliciously look for those signs, I'm just saying that it's a natural reaction mentally. If somebody asks "is my partner cheating?", then you're naturally looking for cards that might indicate that and it sets you up to be susceptible to seeing what's really not there unless you keep yourself on track.
Thank for this. In the past I was tipped off by the cards to my husband's infidelity and it wasn't because I did a reading asking if he was cheating or not. I asked about his whereabouts because his excuse for not being home was odd. I actually was looking for clues pointing to him drinking (he is a recovering addict) and wasn't looking for cheating at all. But the reading raised my suspicions that he was cheating or thinking about cheating, so it prompted me to take a page from Nancy Drew and look for some specific evidence, which I quickly uncovered.
So while I think that the cards can provide one clues that someone may be lying, being dishonest, has more than one lover, etc, just as Grizabella said, you have to be careful not to start seeing what isn't there. Be open minded and not eager to jump to conclusions. And if the cards do point to something like cheating, look at it as an indicator that one needs to be more aware, to start asking more questions, and most importantly, start looking for concrete evidence for cheating.
Accusing a partner of cheating with only a reading as evidence could really backfire.The suspicions could unfounded and hurt the feelings of the other person as well create an atmosphere of mistrust. Tarot and/or the skills of the reader may also be called into question.
Plus, if someone is cheating and all the injured party has is a Tarot reading and maybe a gut feeling as evidence, well, I'm guessing a good number of cheaters are just going to lie through the teeth when confronted. (Which is what they have been doing all along away.) And then they may take the affair underground and which will make finding your evidence even more of a challenge.