Point of order about the canonical step-family: A stepchild is, by dictionary definition, the child of your partner from a previous relationship. So, if Laura is infertile and her kids were adopted (which the dialogue seems to imply), they wouldn't be stepsiblings, and Laura wouldn't be their stepmom; they'd be adopted siblings and adoptive mother respectively.
For them all to be step-family, the kids would each have to come from separate previous marriages to their respective biological parents, who'd each need to have had the kids before marrying Laura or her husband before divorcing and losing custody to them (or dying). So, maybe Eric's step-dad married Maki's bio-mom and Anya's bio-mom first before marrying Laura, shortly after Laura had parted from Eric's bio-dad (or any other combination). If so, I'm not sure how much I can blame the step-dad for wanting to raise at least one child of his bloodline. He's still being an idiot by missing out on Laura's sweet ass (and sweet personality) and an asshole for abandoning the rest of the family, though, especially since finding a surrogate mom may have been an option. So Eric should totally rail his deadbeat step-dad's bio-daughter at some point.
Anyway, what I'm getting at is that the amount of backstory required to make a step-family orgy (as seen in a lot of contemporary porn) with zero incest make sense is pretty chonky, and that much deep lore is fodder for some delightfully soap-opera-ish family/relationship drama. So, I hope this is actually explored instead of using stepmom as an easier-to-say euphemism for adoptive mom.
Also, Vi's dad seems to have aged about 30 years in one update, and now looks believably intimidating. That's nice to see.
Speaking of Vi, it's about time we got to see her touch another man's cock. Hopefully, the future steps of the NTS don't take quite as long with Ari cheerfully cucking Sai and egging her on. Meanwhile, poor Anya's caught in the middle of Maki and Ari both competing to be a bad influence on her. But what's this? It's Eric with a metal chair, swung directly at Anya's innocence. And Rob seem's to be very aware of her voyeurism, so he'll probably give her a show whenever he can as well... It's fun to see her inevitable corruption gain momentum.