'Extreme Sisters': Christina and Jessica Get Naked to Reconnect After a Fight (Exclusive)

In ET's exclusive sneak peek at Sunday's 'Extreme Sisters,' Christina and Jessica perform a grounding ceremony in the woods in an effort to reconnect after their fight over Christina's new boyfriend. The grounding ceremony involves them taking off their clothes to mimic what it was like when they were together in the womb. 'Extreme Sisters' airs Sundays at 10 p.m. ET/PT on TLC.