So, FI and his dad have never really had the best of relationships since his parents divorced when he was little although he did try to make it work. (a very one-sided relationship) About 2 months ago, the you know what hit the fan, and he hasnt spoken to his dad at all. It was a pretty bad phone call with his dad calling him all sorts of mean names.
We honestly think the cause of all of this is his Step-mom who is completely selfish and has never let his dad give him anything or do anything, and they both have a problem with alcohol. So basically this resulted in us taking his side of the family off the guest list because this is what FI wanted. Now, he says he would like to add at least his dad (which i told him you can't have one without the other) back on because he doesn't want something to happen and he have missed this important part of his life blah blah blah.. Which I totally think that is good. So my question is, do I need to add his step-sister, her SO, and 4 kids? We have never really been involved with them from the beginning, mainly just for family events and that sort of thing. I do worry about offending FI's step-mom because she will complain and create drama with his dad and it will make it so much worse for FI. (Not to mention the fact that if they came the bar tab would be out the roof!)Maybe I am being selfish in not wanting to invite her? But at the same time I feel really bad...