The Other One.

After Colin Walcott drops dead at his birthday party his wife Tess and daughter Cat discover he had a long-term mistress Marilyn by whom he has a daughter Cath. An irate Tess throws out Colin's belongings whilst Cat is angry with boy-friend Marcus over a text he sent to another girl. When the two half-sisters meet there is an argument over where to scatter their father's ashes, leading to police intervention whilst they also learn he may have been having an affair with yet another woman.