Complex sentence: Jay, meanwhile, tells Mitchell (Jesse Tyler Ferguson) to stand up against his sister-in-law Pam, who lives under their roof after her divorce and might be a bad example for Lilly (Aubrey Anderson-Emmons).
Split into simpler sentences: Jay, meanwhile, tells Mitchell (Jesse Tyler Ferguson) to stand--up agains his sister in laW Pam? Who lives under their roof after her divorce and might be a bad example for Lilly (Aubrey Anderson-Emmons).