Complex sentence: When Sandy catches Michael in her bedroom half undressed to try on her clothes in order to get more ideas for Dorothy's outfits, he covers up by professing desire; they have sex together despite his better judgment about her self-esteem issues.
Split into simpler sentences: When Sandy catches Michael in her bedroom half undressed (he wanted to try on her clothes in order to get more ideas for Dorothy's outfits), he covers up by professing he wants to sleep with her. They have sex despite his better judgment about her self-esteem issues.