None of these dresses make sense for a mother going out with her son - so much for L&P's realistic approach to story telling.
Realism, plausibility & logic have been vanishing for a couple of years & L&P takes every opportunity to remove any that remains. [So much so that he really should amend his promo blurb & remove any reference to realism]. Sophia will dress as she would have with Liam, because a key teen fantasy is for the son to completely replace the father. This culminates sometimes with the son impregnating the mother & becoming the father of his own brother, thus demonstrating the complete 'conquest' of the incestuously desired 'partner/parent.' [Sometimes with a lot of nude while pregnant scenes, to emphasise the point & demonstrate how potent the son is]. It sounds like a riddle or the start of a bad joke but current kid's porn tastes are what they are. What's missing is a tattoo to proudly proclaim, 'I was fucked by my son.' L&P's propensity to body-modify Sophia, combined with youthful tastes, provides a possibility for this.
How it all works out in their lives is never really explored or explained, because that would introduce complicated consequences & fatherly responsibilities. My thought is that they all "live happily ever after," on free love & fresh air. Enforced radical lifestyle changes are not the stuff of virgin schoolboy fantasies, so realism is out. AWAM IMO, now firmly on the route of average teen porn, has a good chance of taking this course. Those fans for whom the Dev produces his game these days would most likely love it. Realism, even where incest is concerned, is the last thing they require.