I also have a report. Not really a bug, but a translation thing. I was playing as a sexless loser who never used his powers by choice, and several times 'Step Sister' was left as 'Belle Soeur'. Which, on another note, apparently translates into 'Sister-in-Law' according to google. Does it mean both Step- and -in-Law? It started at the first party, when I was asked what my biggest fantasy is, and that was the option, and it happens a few times afterwards
I also found that if you send Emilie and Rosie away at Mia's birthday party, and don't give her a present she calls us her beau-frere.
Also, why is there an option to offer your body, but if you don't pick it he offers anyway? You do so well making thing optional, but this feels a little forced. Plus on the sexless route I still got the naked family scene, which is disappointing.