I'll have to look out for that interaction, I never noticed it before but then once a Sim is in my Sims grasp they never see their family again... Not intentionally but because I hate socialising in Sims.
Lol, you've just gotta admit that Agnes is awesome.
That painting is base game I think. It's been around a while anyway but I don't get it often. It was probably a reference to Riverview or something.