Twins Adam and Jonah are close. Very close. What starts out as an innocent bet - see whose cock their stepsister will touch first - quickly turns into a summer of passion. These siblings like to play. They share a variety of firsts and ultimately, become closer than ever. Twins Adam and Jonah are close. Very close. What starts out as an innocent bet - see whose cock their stepsister will touch first - quickly turns into a summer of passion. These siblings like to play. They share a variety of firsts and ultimately, become closer than ever.