We have 2 daughters, 18 & 22. We raised them super sex-positive, & they've known for many years that we're swingers. For the youngest's recent 18th birthday, she asked we take her to our favourite sex club (her sister came too). They watched me get gangbanged on a sex chair, then took a turn themselves, Bday girl first. I held their hands as they were fucked by ~20 random men each, who came in their pussies & arseholes. Hubby videoed it all. I don't feel bad about it, I'm super proud of them!!