AITA for not inviting my boyfriends mother to our Easter dinner?

Am I the asshole for not inviting my boyfriends mother to the family Easter dinner? Little background, my boyfriend has not had his mother in his life for well over 10 years… they don’t speak to each other and really don’t get along… We went to his family Christmas party this last year and it took her over 3 hours to even say hello to him. He will be civil and polite when we’re out at major family outings, but he doesn’t go out of his way to talk to her. At Christmas all of the kids were told to pick a holiday that they will be hosting… we got voluntold we’re doing Easter.

Fast forward to recent events… we sent out the invites for Easter dinner and we didn’t include his mother… he doesn’t feel comfortable inviting her into our home. His grandmother went out of her way to invite his mother to Easter even though we specifically told her we didn’t want her there. His grandmother has now called him several times arguing with us that we need to invite his mother to Easter that she’s family and we need to get over the issues that his mother and her second husband have caused him from the past. We have told her that it is our home and we will decide who we want to invite to our family gathering… his sister had also now called him to yell at him and tell him that he needs to just get over the past and all of the horrible things that his mother has done to him and just invite her… we have told his family that the ones who were invited are welcome to show up… but if his mother comes she will be told to leave and not invited in. So am I the asshole for not inviting his mother when he feels uncomfortable with her being around?