MIL is nearly 80, brother late 40s FFS. Started off quite sweetly, haven't seen each other for a couple of years, he comments on how great she looks etc etc.
As drink flowed this afternoon it's moved on to a whole new level of sexual innuendo and touchy feely.
The teens are mortified and have disappeared into another room, emerging occasionally to catch my eye and go "really? Yuck". DH is a bit pissed and thinks it's amusing.