Vintage step *** swinger scene ID

[Billywhizz]

I can’t remember the scene super well but I know it’s a vintage scene… it’s a brunette woman (milf) that takes her supposed step-son (husbands son?) to what I think is a swinger/sex party and I’m pretty sure people wear masks at the party and they unknowingly have sex… at the end of the scene she asks the son how the party was and she finds out they had sex (he doesn’t know) and says don’t tell your ****** what happened and I’ll take you to the party again