Complex sentence: At home, Carlos tells Gabrielle that it wasn't a smart idea to do that but because there has been awkwardness since Gabrielle ran away from home some 15 years ago she tells Carlos that her mother would not understand.
Split into simpler sentences: At home, Carlos tells Gabrielle that it wasn't a smart idea to do that. Gabrielle insists that because there has been awkwardness since Gabrielle ran away from home some 15 years ago that her mother would not understand.