thank you everyone. Some great suggestions here, which have helped me to come up with a plan.
1. decide what the boundary is... 'when you do this behaviour, I will...' 2. bring this up when I visit his IC with him at earliest opportunity and state my boundary there 3. as Yail suggests, check in here or in a personal diary to keep a clearer log of how often and when this happens 4. GAL, detach, give acts of service, count the good things
Merry Christmas everyone. I will check back in the New Year. I wish you all good things in your home lives.