Complex sentence: Stacey has Ryan's name added to Lily's birth certificate but Ryan lies to Janine about where he's been so Janine doesn't tell him that she knows, and decides to kidnap Lily and take Ryan to France to get Stacey out of their lives.
Split into simpler sentences: Stacey has Ryan's name added to Lily's birth certificate but Ryan lies to Janine about where he's been and Janine does not tell him that she knows. She decides to kidnap Lily and go to France to get Stacey out of their lives.