Complex sentence: She becomes obsessed with caring for the home, begins to dress as if she is from the Victorian age, and of particular concern to her is the room outside Mrs. Allardyce's room with its huge collections of framed pictures and a music box.
Split into simpler sentences: She becomes obsessed with caring for the home and begins to dress as if she is from the Victorian age. Of particular concern to her is the room outside Mrs. Allardyce's room with its huge collections of framed pictures and a music box.