Megan claims her ex-boyfriend Andy is trying to “phase” her out of their son’s life and replace her with his fiancée, Caitlin. She claims he lied to the court about her abusing drugs, so she lost shared custody of the 5-year-old, and now, she says he makes it hard for her to see their son.
 
Andy denies all the allegations and says he has proof to back up his claims against Megan.
 

Dr. Phil drills down with Megan and asks her about her alleged drug use – and dealing – and why she allowed her son to see his father after she claims the boy told her he was abused. Watch more here.
 
In the video above, Dr. Phil explains why he believes Megan was lying to him. And he shares the importance of owning your behavior in order to make a change.
 
This episode airs Tuesday. Watch more here.