Gut feeling am I crazy??

So as far as I know I don’t think my husband has ever cheated on me other then caught him seeing porn I mean nothing else. Today however I got this weird gut feeling he is because he has this lady friend who he use to work with she’s almost 10 years older so she’s in her late 40’s but he’s her mechanic he fixes her cars and what not. Idk why I got this feeling today I brought him lunch to his work and her car was there she was inside his trailer but it’s used as an office she was collecting money from him cuz her son was doing a favor for my husband so she was there solely for that. They have been friends for years now but they never hang out it’s only return favors that they do for each other but I remember a long time ago when he first starting working with her maybe 10 years ago before they were friends he mentioned her that she was a freak and gave another married man a coworker a blowjob that the guy had told him. I thought nothing other then what a nasty lady at the time and forgot about it honestly but now I’m like how do I know she doesn’t blow my husband??like wtf did this cross my mind? Am I crazy someone please tell me I am 😅😅