Complex sentence: In the morning he called her and told his decision that thenceforward he would serve her and she should dwell there as the mistress of the house and if she insisted on leaving the house he was willing to free her from bondage.
Split into simpler sentences: In the morning he called her and told her his decision; he would serve her and she should dwell there as the mistress of the house. If she insisted on leaving the house he was willing to free her from bondage.