Don leaves Megan behind?

On Sunday's episode of Mad Men, Don and Megan get into a fight about how he controls her while they are at work.  She then yells at him for not calling his mother (AWKWARD) ! Afterwards Don gets up from his booth and hops in the car without Megan. When he relaized what he has done he goes back to the restraunt and goes to get Megan, only realizing that Megan is no longer there. When he returns to their apartment, Megan is home and is furious at Don for abandoing her. Don then hugs Megan like he is never going to let her go. I'm proud of Don Draper this season for not cheating!