Complex sentence: Mercedes enters into a relationship with Doctor Browning to make Riely jealous, however receives a phone call from Jacqui while she is with Browning who tells her she has found Lynsey's scarf in Doctor Browning's drawer.
Split into simpler sentences: Mercedes enters into a relationship with Doctor Browning to make Riely jealous. Jacqui calls Mercedes and tells her she has found Lynsey's scarf in Doctor Browning's drawer.