I don't get it. What's the point of a complex storyline that would work just as well if this were b/g porn, with one of the moms a dad and one of the daughters a son?
Two older lesbians who used to be an item. Presumably the youngers are also lesbian, or close to it.
There's no suspense about the outcome, and - since all involved are already experienced slit-lickers (or perfectly at home with the concept) - there's no drama when it happens: Already-lesbian women and girls have lesbian sex with other already-lesbian women and girls.
Is it hot sex? Of course - that's the standard in quality g/g porn these days, which means it earns no extra points for being there.
Are you talking about " Blame it on Rio " ...Young Demi Moore. Before she got involved with that Kutcher creep. Not to mention Bruce Willis.