My 6th sense is telling me that even the bitch friends married a rick man with a loser son and the dads are away most of the time watching the house on some spycams because that is their fetish.
Yes, their fetish is being the best father's in the world and give their children's high quality escort to play with.
But really, too many coincidences, the MC is a avid viewer of porn videos, is a recluse, is on a very private site with a VIP service that cost millions that is just some orgies with above the average hoes in them, for that price they should be doing stuff that would shame their ancestors.
MC casually gets the chance to buy the pass after living with step-escort for some time and escaping her everytime, she dresses really lewd at home but acts like tight sports clothes cover too little, she brought all her co-actress in the home together and the MC could then recognize all of them easily and do 2+2 with his stupid brain, probably a move from the council of awesome father's to make him finally act.
Airhead prostitute is in a similar situation with her stepson running away.
The girl's were probably hired to do the kids.
The thing about airhead being unable to have kids is a surprise, all of them could be high quaility prostitutes that were sterilized so to not give problems to rich clients, she could be liyng too, just to lower MC defenses.
I wouldn't be surprised if MC receives a link to a new video but the tother side messed up and he see his father railing stepmother before they were married or doing another girl with the waifu being done from some other rich dude.