Does it though? If they think, or at least pretend to think they're not related and Sophia already made out with Pat in front of them in one of the routes is it that much of a stretch for her to make out with Ellie? I also think there could be some advancement if there's some minor relations in the sauna then Ellie and Sophia are in the locker room together. I think this has to be the logical conclusion since l&p said both routes basically end the same way.
Yes, it's a huge stretch. I get that since the start of episode 2 the story has been leaning pretty heavily towards the afore mentioned nonesensical character destroying farce path. But even then ...
Ellie and Sophia getting hot and heavy in front of a couple of college underclassmen, one of which we know Sophia doesn't like, doesn't make any sense at all. Correct me if I'm wrong, but I believe the only way this scene even happens is if Ellie forgave Logan, meaning they are still a couple. Sophia doesn't like Logan, and certainly not as a partner for Ellie. There is zero incentive for Sophia to do anything that would keep Logan interested in Ellie or think that there's some Ellie/Sophia sharing option for him in the future.
Also, Sophia is not going to cheat on her husband in front of her daughter, unless we're truly and irredeemably on the path to the dark side of the farce.
So I think we're left with either dumb, or rehash, or, and most probably, dumb rehash.