Luker getting out of the shadows here just to thank you, Scale. You're the BEST!
As for the scenes with the Mother, here is how i got them: i catched Erick spying on Alice, made noise, and woke her up - then (took me a few tries) i managed to convince her that i was telling the truth about him spying - Erick managed to salvage the situation (dafuq?) somehow and i was sent to bed with the promise of punishment. The other day, i went to talk with Mom on the lounge and asked her to stop punishing me in public - there a new dialogue popped up where i could propose to start bringing money to the house and she agreed. From there on you just need to pay her 500 bucks a week to "prove" her you're not a useless neet0 (wich you are) and she will ask you to go to her room when you are in for a spanking.
Also, i recommend using only the money cheat, since with maxed out stats is virtually impossible to piss the mom off.
Another tip: if you wanna get all the auntie scenes, is better to leave her tied up the first time you do the "special" photoshoot, and tell her you regret nothing - leave her do the work the second time around, since the options to chat with her on the pool seems to get blocked after some time.