And she LAUGHED?????? This would make me think of whether or not the relationship with the BF could survive not having this family back in your house. Since they didn't even offer to make it right, I highly question what I would do in the future if this BF relationship took off for something serious. I mean, how would you handle it? How appalled was your BF? Did he state they shouldn't come back? Or does he think they should? Did he offer to make it right? (Just offer?) It is his son.
Think carefully about the future with these folks in it, and what they mean to your BF. It's a hard situation. I know you won't have them back...I'm sure that's clear. And you can do that with a BF. A little harder with a hubby's son!
Sorry this happened.