.My fiancee's parents have been divorced for years now, but they get along great..no dysfunction, that may be expected in some divorced families. Now here's where the issues begin..My future father in law started seeing someone new about a year ago. After, 4months of dating, he moved her & her 3 kids in(still not a problem, at this point&Then, recently got engaged,which will be the new wife's 4th marriage).But then, she started causing alot of problems, by talking crap about my FIL's kids(one being my fiancee & myself) She started putting wedges in the family & saying my FIL's "adult children" weren't allowed at the house(which they grew up in) & Lying about my future MIL & a TON of other things. So, of course we prefer to only invite people we love & vice versa, to our wedding, BUT my future FIL is helping pay for the venue & feels he should be able to bring her & Isn't taking anyone else's feeling into consideration...We have to "suck it up" for every holiday to come, but he feels I'm the one being selfish, by not wanting her there on our Wedding Day..Our ONLY day. Does, anyone else feel like we are in the wrong to ask him to be the one to "suck it up" for 1 day & leave her at home with her kids?? Or should we really be the ones to do that on our wedding day???