"He was on the road to recovery, bought the new house near Kourtney and was cordial with her," ET's source said, "but he's been up to his old tricks the past couple of weeks."
According to an eyewitness, Disick partied at La Santa nightclub in Puerto Vallarta for nearly three hours, where he met two women, a blonde and a brunette whose names are unknown. However, the women did not appear to leave with Disick.
During the day, Disick and three bikini-clad women were photographed relaxing in the sun while hanging out poolside at a Joe Francis' home. Disick was seen smoking and appeared to be drinking both a beer and a mixed cocktail.
Disick reportedly went on vacation with Girls Gone Wild founder Joe Francis, along with Francis' girlfriend, Abbey Wilson.
Just last week Disick and Kourtney were spotted having a "flirtatious" night out together at 1OAK night club in Los Angeles to support Kanye West during his club appearance. Check out the video below for more on the former couple's enjoyable evening.