Monster in law??

Anyone else's FMIL hateful and tries to make everything about her?? My FMIL has been this way ever since me & FH has met... she has literally made every holiday and living hell because of the rude comments and the things she has said about me before. We've gotten to the point for our dating anniversary we spend it at my house.. and always try to go out for Valentine's Day so we don't have to be around where we live... last vday she called and yelled at him. She blew his phone up, oh did I mention she texted him and told him she was going to come get him from wherever we were????? I honestly don't want her apart of our wedding planning, how do I make her phase out of it without hurting her or FH feelings??