Should I not go swimming with my sister in law because of my interest in swimsuits?

Depending of how ur sister in law is she might take it in different ways. I suggest not tell her cuz u might freak her out and think ur a perv. Or just tell her she look pretty or hot in that swimsuit. But then she might understand it in a different way as in flerting with her. But hope not. Just go swimming, don't lose that good friend relationship with her just cuz seing girls in swimsuits turn u on. Or tell her but in a different way. By asking her if she thinks if that is weird. Say that a friend told u that. And u want to help himor something like that. So u can get her opinion. Hope it helps in some way...