Gender reveal

Jay

My sister is planning my gender reveal for December 9 I’ll be about 16 weeks . I’m doing sneek peak. ! So question is should I invite MIL after everything she said I really don’t want her there . But my sister was like out of courtesy do it ! Can’t stand her or my SIL who is 15 ! And acts like she’s a god dam 18 year old ! What boundaries should I set ‘ any advice ??