Romance with gangster/mobster flashbacks

[risetotherush]

This is a book that I probably read about ten years ago so I'm sorry if this is very rambling. It was mainly a contemporary romance/mystery book about a woman whose father had recently died, but he had left her a house/apartment in New York(?) and she had to move there and find out what happened to her grandmother who had disappeared when the father was younger. The father had planned to move there himself before he died. The grandmother had been a singer and a gangster's girlfriend when she was a young woman.

The male protagonist lived in the same building (I think) and had known the father. He also had an honorary uncle/godfather that had been secretly involved with the grandmother when she was younger. He was also very rich, had a twin brother and a large family and I vaguely remember a party/family event where the twin brother tried to play a prank on the female protagonist where he pretended to be his brother but the female protagonist didn't fall for it.

At one point in the book the now old gangster turned up and tried to claim being the female protagonist's grandfather. Throughout the book there were also flashbacks of the grandmother's life to try to help solve the mystery as to what happened to her.

Thank you for any help, this has been driving me crazy!

ETA/Found!

Book is Sweet Liar by Jude Deveraux as found by bubblesbrnaid

Comments

[bubblesbrnaid]

"Sweet Liar" by Jude Deveraux.

[risetotherush]

That's it! Thank you so much!