Complex sentence: She fears he is cheating on her with Gisella and when she sees them together, she accuses Eduardo of cheating and calls off their engagement but back in L.A., she becomes embarrassed when she finds out Eduardo asked Gisella to sketch designs for her wedding dress.
Split into simpler sentences: She fears he is cheating on her with Gisella and, when she sees them together, accuses Eduardo of cheating and calls off their engagement. Back in L.A., she becomes embarrassed when she finds out Eduardo asked Gisella to sketch designs for her wedding dress.