My MIL has this bf that from day one I just didn't get a good feel about. They have been dating about a year. Initially it was just a gut feel but now some things have happened that have validated my instincts. I would love your opinions if I am being overprotective. I have 2 kids, a boy 20 months and a girl 3 months. He is a little too interested in my son. He won't leave him alone, always playing with him even when I am in the middle of something with him. Examples - twice now he has tried to take him out of his high chair in the middle of dinner and after we tell him not to. On my sons first bday after the cake smash and he was a total mess, I was giving him a bath and the bf came in the bathroom and said "I gotta see this". Meaning watching me bathe him. Last week I took my son to change his diaper and get him in his pj's and the bf followed me in to the bedroom to in his words "mess with him while you're changing him". On both of these occasions I made it clear that he should leave by saying "we'll be out in a few minutes". And not undressing my son until he finally left. For what it's worth, he and my MIL are nudists and swingers. He has recently moved in with MIL and I do not feel comfortable with them babysitting my kids which she suggests about once a month. I always come up with an excuse so they never do. Am I overreacting? I hope he is just a nice man taking an interest in my kid, but these incidents seem creepy to me. It doesn't help that I am not a fan of my MIL... My H thinks he's just a weird guy. He doesn't like him either but feels as though his mom would never do anything to harm our kids. I agree with this, but she trusts and loves this man. What if she just runs to the store and leaves my son with him? Sorry about the big long paragraph, I don't know how to format on my iPad.