Complex sentence: After Fitz goes back to his pregnant wife at a time when she needs him most, it serves as the final straw for Penhaligon and she ends Fitz's hope for a reconciliation in "True Romance" much to his dismay.
Split into simpler sentences: After Fitz goes back to his pregnant wife at a time when she needs him most, it serves as the final straw for Penhaligon. She then ends Fitz's hope for a reconciliation in "True Romance" much to his dismay.