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-*** (husbands ***?) 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 *** 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