The House of Mirth
Eventually, Lily Bart receives a ten-thousand-dollar inheritance from her Aunt Peniston, which she arranges to use to repay Gus Trenor. Distraught by her misfortunes, Lily has by this time begun regularly using a sleeping draught of chloral hydrate to escape the pain of poverty and social ostracism. Once she has repaid all her debts, Lily takes an overdose of the sleeping draught and dies; perhaps it is suicide, perhaps an accident. That very morning, Lawrence Selden arrives to her quarters, to finally propose marriage, but finds Lily Bart dead. Among her belongings are receipts for her payments toward the debt she owed to Gus Trenor, proving that her financial dealings with Trenor were honorable and not evidence of an improper relationship. His realization allows him to feel sympathy and closeness for her, and he is clearly distraught by her death.
Lydia Hart
After Zoe is released from prison and is found not guilty of Sarah's murder, it is believed that Sarah committed suicide after her diary, found by Mike Barnes (Tony Hirst) is used as evidence in court. Soon Lydia starts to befriend Zoe and she ends up moving in with the Barnes family where Lydia now lives and soon Zoe plans too uncover Lydia's murderous ways as she does not want to be known as a killer. In an interview with entertainment website "Digital Spy", Lister said of the storyline, "It all gets really messy from here! Because Lydia's really deranged, Lydia starts thinking that because she loved Sarah and Sarah loved Zoe, if she gets with Zoe, that'll be the final piece in the puzzle and it'll all work out." 
She explained: "Lydia starts becoming obsessed with Zoe and to keep control, Zoe has to go with it. There's a point where Lydia kisses her! And then Mike walks in and kicks Zoe out."