True Life Secrets #11

Gail, having spent her inheritance, visits her wealthy twin sister Wendy. When Wendy is killed in a private plane crash that Gail survives, Gail decides to assume her identity. She agrees to marry Wendy's rich boyfriend Scott. However, the fisherman who rescued Gail blackmails her and she decides to murder him. She's interrupted by Scott, who is then exposed as a married fortune-hunter. Wendy returns, having also been picked up at sea. She orders Gail to leave forever.