The first season of the American television drama series Mistresses premiered on June 3, 2013 and concluded on September 9, 2013 on ABC.

Mistresses stars Alyssa Milano, Jes Macallan, Rochelle Aytes and Yunjin Kim as the four lead characters.

Adding to this, when Joss finds out that Savi told only Karen and April about her affair and pregnancy, she is so hurt that she moves out.

Still hurt over his wife's betrayal, Harry informs Savi that if the baby isn't his, he will be asking for a divorce.

After her patient, Thomas Grey, reveals that he is dying of lung cancer and that he has been in love with her for a year, Karen begins having an affair with him.

Things take a dangerous turn after Sam falls in love with Karen and begins stalking her.

When the insurance company gets even closer to the truth in their investigation, Elizabeth asks Karen to forge notes stating that Thomas was suicidal.

Unbeknownst to Karen, Elizabeth is setting her up in an attempt to ruin her career and reputation to exact revenge for sleeping with her husband.

April is the single mother of a young daughter, who has been widowed three years prior after her husband Paul, went missing in a boat accident.

At her friends' advice, she decides to jump back in the dating pool with a single father, Richard.

After working out a payment plan to satisfy Miranda, April attempts to move on with her life, only for it to be rocked again with the revelation that her thought-to-be-dead husband is actually alive.

However, after Lucy temporarily goes missing, April turns to Paul for comfort which rekindles old feelings for her not-so-late husband.

In February 2012, ABC announced that it had green-lighted Mistresses with a direct-to-series order and a planned summer 2013 airdate.

Steinberg and directed by Cherie Nowlan, which had previously been under consideration for a pilot order for ABC's fall 2012 schedule.