Complex sentence: Although they have a brief falling out over living arrangements and Michelle's stress over James, the engangement is on and after Christian gets Wilbur back, he asks Michelle to be Wilbur's adopted mother, and she, after some relucatance, happily agrees.
Split into simpler sentences: Although they have a brief falling out over living arrangements and Michelle's stress over James, the engangement is on. After Christian gets Wilbur back, he asks Michelle to be Wilbur's adopted mother-she is initially reluctant but eventually happily agrees.