Anyone else ever get some...really disquieting glitches?

https://youtu.be/K29UsZxgNco?t=14m38s
vixella has a sim in her game who also seems to be the child (or wife) of one of catarina's cats.

i've never had any glitches like this in my game, besides the one where adults would invite child sims out to the nightclub. i did have a sim who constantly walked in on his child stepdaughter while she was bathing, even though there were five bathrooms in the house. he'd also randomly get flirty when talking to her. that creeped me out quite a bit, but luckily i had planned to kill him off after my sim married him anyway. :/