An Incest is Best Story
A young professional woman exposes her lustful, submissive side in a special ceremony after her wedding.
She gives control of her sexuality to her new husband, and he makes her behave in a way that shows everyone in attendance what an extremely sexual person she can be. Family and friends watch her prove her obedience and demonstrate her wanton nature.
This is a different variation of the same kind of theme as "Bet Your Sweet Ass." In this one, though, the siblings are in lockdown due to coronavirus, parents and her boyfriend are quarantined elsewhere, and the brother and sister are a little slower, more hesitant in pushing their luck. A little.