I'm right there with you, OP, only it's my sister who's dating a married man. He's got a disabled son, around 5 years old. He stays most nights at my sister's new apartment. I don't know what he tells his wife. I do know that he's somehow able to clock in at his job, then he sneaks off for hours at a time. He comes back to work just to clock out. Awhile back he was caught stealing pain medicine from my now-deceased stepfather, and he's been caught snooping through closets and drawers on more than one occasion. He comes across as being SLIMY.

Oddly enough, our mother's house was broken into during my stepfather's funeral. (My sister lived with my mother until just recently, and often had her boyfriend over.) Although the boyfriend was at the funeral and couldn't have robbed the house himself, we suspect that he had something to do with the break-in. He'd been snooping in my stepfather's room, and knew exactly where the stolen items were kept. Very specific items were stolen, while other items of more value were left behind. The detectives said that whoever was behind it had been in the house before and knew it well. We also suspect that the thief had been searching for pain meds, but hospice had already disposed of them. I'm also fairly certain that he's taking at least some of the money that's intended for his disabled boy.

My sister is so obsessed with him that she isn't thinking straight. She sees NONE of this. According to her, he can do no wrong, and how DARE we suggest otherwise. I honestly don't know what she sees in him, but she thinks he hung the moon. I hope to goodness she doesn't get pregnant, but it's a very real possibility. She's 40 years old, by the way, and has a high school-aged son by her first husband. Married twice; divorced twice.

She's been seeing this guy for probably a year now. One of these days, it's all going to come crashing down, and I'm worried sick about the effect it'll have on my sister.