It's Perfectly Normal (2022)

Athena brings her stepson Tyler to see therapist Dr. Sonia Harcourt to work on his intense masturbation issue. When Athena reveals that she overheard Tyler calling her name while jerking off, Dr. Sonia tells her it’s perfectly normal for him to feel attracted to his stepmom. Dr. Sonia then guides them through an intimacy exercise in which all three end up having a hot threesome!