NC'd for this as it's outing... It's long, bare with me..
FIL is remarried and DP and his two DBs have 3 step siblings. We're all in our twenties and are close, we do things together and one of DP's step brothers is also his best friend. We also have DD who is a toddler.
Yesterday FIL's wife found out he has been having an affair. FIL has now left his wife to be with this new woman. Everyone is obviously devestated. The family has been torn apart. One thing that became apparent yesterday was how all of step family don't want to lose us as family and can they still be uncles/auntys to DD. Which is what we want too.
Now the AIBU. FIL is coming here tonight to drop off DP's brother. He's asked us if he can bring his new partner...
I thibk DP wouldn't mind as he'd do anything not to upset his father but I've refused. I'm a bit 
and think it's way too soon and raw for that. First of all I don't want to see FIL because I'm angry for what he's done and secondly I think it would hurt the people who are already hurting if they found out we've already met and accepted the new woman in FIL life.
AIBU to say no, it's way too soon bearing in mind he only left his wife yesterday?