I'm the One You Need - Rob Mattews

'Rob is reunited with Tina, his cuckoldress wife. He convinces her she’s better off without Adam, her last lover, but he knows she’ll never be satisfied with just him and will soon be on the hunt for a new stud. Meanwhile, Rob is confused. He still loves Tina, but also has strong feelings for Charlotte, the sexy young goth who befriended him while Tina was with Adam. To make matters more complicated, Charlotte seems more interested in Tina than in Rob.
Adam introduced Tina to aspects of sado-masochisn, which she’s keen to explore in more depth. Charlotte has some experience of this and offers to take Rob and Tina to a BDSM club. Tina doesn’t meet anyone there, but Charlotte encounters her abusive ex-girlfriend, Natalie. Despite Rob’s protests, Charlotte goes off with her. Meanwhile, Tina reconnects with an old friend, Nathan, who offers to help her explore BDSM.
Alone, Rob realizes it’s not Tina he misses, but Charlotte. Is there any chance he can start a new life with Charlotte? Just as he wonders this, Rob realizes Charlotte may be in more danger than he initially realized, and that she may need his help now more than ever. '