Complex sentence: Meanwhile, Alec is out looking for Aline when he founds Magnus and after saving his life have a discussion about their relationship and Alec promise that if both live he will introduce Magnus to his whole family.
Split into simpler sentences: Meanwhile, Alec is out looking for Aline when he finds Magnus. After saving his life they have a discussion about their relationship and Alec promises that if they both live he will introduce Magnus to his whole family.