"I didn't want a confrontation with Dina while Lindsay is in rehab," Michael tells RadarOnline.com exclusively. "I've decided to go home and see my baby."
Ironically, it's unlikely Dina will be there either, a source tells us, leaving Lindsay without any family to counsel.
The two fought on camera, with Dina refusing to take the lie detector and urine tests that are the show's centerpiece.
Lindsay is a month into her court-ordered 90 days in rehab sentence, and is desperate to be moved to another facility.
"She hates being at Betty Ford," a source says.