I would suggest to stop trying to talk to her about your R. Back off. You arent going to make her stop. Also, tell your MIL to back off as well. Detach detach detach. Validate and thats it. Stop giving suggestions or feedback on behavior. It does not help.

Focus on yourself.

M:16
T:21
H(me) 38
WW: 38
S11 D16 D19
Red Flags of A: March 2018
ILYBNILWY: August 4, 2018
Moved out of MBR: September 24, 2018
BD/Confirmation of A: October 31, 2018
D Filed: March 27, 2019