Complex sentence: Mercedes learns that she has not contracted HIV from Malachy, which a "Hollyoaks" source described as "bitter sweet" due to Mercedes having a husband who could die and leave her on her own.
Split into simpler sentences: Mercedes learns that she has not contracted HIV from Malachy. A Hollyoaks "source described Mercedes not having HIV as" bitter sweet "because" she has a husband who could die and leave her on her own.