The family of four (husband & wife: Tom and Alice, kids: Maggie-19 and Mark-18) were 2 weeks into a month long vacation at a cabin by a lake. Husband and wife still had not had s*x with each other for over 10 years. Their daughter Maggie and her first real boyfriend (Randy) had recently broken up. Randy had taken her virginity a year earlier and after experiencing s*x for the first time, she was hooked. She loved s*x. Mark, their son was in a long-term relationship with Tammy (an older woman). Tammy had convinced Mark that they should enjoy an open relationship.
--------------------------------
After repeatedly being tempted to f**k his mother, Mark finally accomplished the task. They had oral s*x in the living room, culminating in Mark finally sliding his c**k into his own mother's sacr
