"Mistresses" certainly knows how to turn up the heat between sheets as the show's characters engage in controversial threesomes and help a woman catching her cheating husband in the act. What lies ahead for fan-favorite Karen or the vivacious Calista?

It looks like this Thursday's episode will see many twists and turns as Harry deals with the aftermath of sleeping with Niko. Sleeping with the boss' mistresses is certainly going to land that character in trouble. Or will he? According to the episode's description supplied by Spoilers Guide, it seems Harry's mistake could lead to an unexpected and pleasantly surprising venture in his career. Trust "Mistresses" to bring viewers plot twists they least expect.

While Harry learns that his mistake actually brought on good fortune, Karen is going to explore an unchartered territory in her three-way relationship between her, Dr. Alec Adams and his wife Vivian. As per the episode's promotional clip, Karen is going to engage in steamy sex with Alec when his sick wife Vivian is out of town. Could this jeopardize their three-way arrangement? How will Vivian react when she knows that the two made love without her? Threesomes rarely end well in reel life.

April receives a visit from her mother, Marjorie, and this brings up up some issues from her past. April needs to overcome these issues but seems like she will struggle to do so.

Meanwhile, Joss and Calista start scheming ways to take down Calista's constantly cheating boyfriend, Luca. The promotional clip shows Joss seducing Calista's husband and recording the seduction as a part of their plan to take him down once and for all. But will the plan be successful? The synopsis teases that Joss realizes she has gone way over her head once the plan is set in action.

Catch "Mistresses" on Thursdays at 9 p.m. EST on ABC.