Stay the course. Keep DBing, stick to your guns on not going to the family event. MIL and SIL sound toxic.
Also, 180 on the lying. Next time you get intel, just tell your W you know, not how. No need to lie. If she keep pushing just tell her the subject is closed.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018