Complex sentence: Sympathetic but still wary, Jenny teaches him how to drive a car and use credit cards so he can continue the journey alone, but when she witnesses him miraculously resurrect a dead deer, she is deeply moved and decides to stay with him.
Split into simpler sentences: Sympathetic but still wary, Jenny teaches him how to drive a car and use credit cards so he can continue the journey alone. However, when she witnesses him miraculously resurrect a dead deer, she is deeply moved and stays with him.