He had felt the sexual feelings from the two and walked down the hallway peeking in through the cracked doorway in time to see Reannen take off her jeans and climb into bed with Alassra.  He watched them fool around and then Alassra's nightgown was tossed across the room.  He felt himself become more aroused.  He continued to watch the girls becoming fully erect. right as they were coming to climax he pushed another image of himself and Alassra doing similar things seeing if she'd receive them.