Complex sentence: Sunita tells Sophie the kiss will have meant nothing to Amber and to focus on what she has with Sian, feeling guilty and taking Sunita's advice Sophie proposes to Sian when she comes home from holiday early.
Split into simpler sentences: Sunita tells Sophie the kiss will have meant nothing to Amber and to focus on what she has with Sian. Feeling guilty and taking Sunita's advice, Sophie proposes to Sian when she comes home from holiday early.