Aibu to think that if a person gossips a lot and runs other people down a lot to you, then they probably gossip about you behind your back too?
My in laws always gossip and bitch about their other dcs partners. It's not just a little, it's their main topic of conversation and it's always very hateful and spiteful. They probably do have a point with some of what they say, but they do not see their own faults or their own dc's faults. They always blame the husbands/wives/partners.
I have told dh that they shouldn't be doing this and that they obviously go to his siblings and bitch about me too.