Stepmom Teresa took her stepson Luis to a psychologist Dr. Silvana Martell to help Luis get over his sexual fixation on Teresa as she is his stepmom. However, Dr. Martell convinced Teresa to allow Luis to fuck her so that he will overcome his fixation. So, Luis fucked his stepmom in the presence of the psychologist & both stepmom and her stepson tasted the pleasure of each other which was very surprisingly compatible. Dr. Martell further recommended that Luis should fuck his stepmom everyday inorder for him to overcome his sexual affinity on his stepmom.
After sometimes, Teresa decided to change the psychologist as instead of solving the issue it became worse, even Teresa started enjoying the sexual pleasure with her stepson & Luis got even more sexually fixated on his stepmom. The new psychologist is Dr. Marian Franco who will be examining their case & upon learning that Dr. Martell made both stepmom-stepson cross family boundaries, she wanted to figure out if they wanted to end the sexual relationship. Luis wants to continue but Teresa wants to end it. However Luis says that whenever Teresa has sex with her she confesses to him that she wants to be with him to which Teresa says that it's only because she gets horny. Dr. Franco persuades Teresa to allow Luis to fuck her stepmom right there, to confirm the situation that Teresa does indeed wanna continue the sexual relation. So, again Teresa gets fucked by her stepson and Dr. Franco too join them. All of them had a good time & at the end Dr. Franco concluded that Luis is seriously fixated on his stepmom whereas Teresa is diagnosed with Bitch Syndrome. So, both stepmom & stepson are stuck in this sexual relation forever and it can't be cured.