Depends on what your relationship is with the FIL. My SIL comes in town and stays with me and the kids. She doesn't see my H-her brother. H has cut off communication with everybody. Even a best friend from his childhood was in town. H didn't see him. I did.
This time last year(when all of this was starting) SIL was coming in town. I had asked H if he were not going to work on our M, then to ask her not to come. I was an emotional wreck at the time. He said nothing to her. I of course took this as a sign of hope. Not to be....
SIL know the situation. I have maintained contact with her. She is supportive of me and the kids.
As far as your FIL. If you don't want to have him over, then don't. or another option go for an ice cream so the kids can have time to visit
I am still very accommodating to my H. sometimes I think too its time for him to face some reality as to what he's doing to our family( ie, he doesn't get to come just when its convenient for him)
We were at a race recently out of town for S16. I ended up booking my own hotel room for me and D.I think it was better that way..


M48 H50
M21 T26
S20 at college),S17,D15-cp, dev. delay- cogniv 5yrs old
PA confirmed 7/2012
H separates 9/2012
H move home 2/13& 7/13 lasted 2weeks.ILYNILWY
OW still in picture. h filed 10/13