Could someone please please let me know the name of the book, in which the MMC was a Russian businessman and also had his hand in the mafia world, the FMC is Bengali, owns a flower shop that she inherited after her mom died and she often babysit MMC's baby boy. The MMC was a single dad of a baby boy and also best friends with FMC's brother. The FMC was verbally abused by her maternal side relatives for being the reason their daughter is dead (FMC's mom).
I feel like the book's name is Colliding hearts or colliding worlds. But I'm unable to find it under these titles so maybe I'm completely wrong. Please let me know if you know the author or book.