Amongst other things, I found my in laws very sexist.
For example. They’d do family gatherings which would be everyone goes to the pub, but then the women and children all walk back to
the house to prepare food while the men stay in the pub and get as drunk as possible. When I declined to go and prepare the food with all the women it was frowned upon.
Family dinners were always mil doing all of the cooking, then the women clearing up afterwards while the men all sit around chatting, drinking and falling asleep.
Mil gossiping about the state of other people’s houses and telling me the women of the house was dirty and a slattern, despite men living there too.
When dh and I were buying our first home and moving out of our rental. We were sorting out and doing tip runs and packing. Mil and Fil turned up unannounced to ‘help’, mil turned up with a bag of cleaning products and announced she’d come to help me to clean the property and that fil would take fb to the tip. Even though we’d not asked for any help or given any indication that I’d be cleaning alone.
On the very rare occasion we asked for a days childcare then saying it was for me to help me as I had to go to work, even though their son has a full time job too so presumably they are helping their son too.
Just a few examples and plenty more where that came from.