In-laws can be really difficult to handle. If this were my situation I would ask my FI to talk to his mother and explain. - Look either you are supportive or we won't include you in any more of the planning - Then do that, if she is still being a B*tch then cut her outta the loop. However, be prepared for the worst. That is what we did and she still has not decided to be supportive...so...she at this point will be lucky to get an invite to the wedding (not like she can afford to go anyway). Oh and that no invite thing is my FI's idea, not mine... I feel horrible for him to have that bad of a relationship with his mom. I keep hoping she will grow-up and they can talk/have some sort of relationship again.