Complex sentence: Beralde points out that sending them to a convent was Beline's idea and suggests that she might want the children out of the way for her own reasons, but Argan gets angry and leaps to her defense.
Split into simpler sentences: Beralde points out that sending them to a convent was Beline's idea. He suggests that she might want the children out of the way for her own reasons, but Argan gets angry and leaps to her defense.