Hunter's Moon by C. J. Adams & Cathy Clamp
Hit man Tony Giodone has seen some wacky whack jobs but this takes the cake. Sue Quentin, winner of a huge lottery jackpot, wants him to off her. She is so desperate to get away from her obnoxiously calculating and avaricious family, she feels that death is the only escape. Tony, meanwhile, has made a miscalculation. Ever since he was bitten by one of his targets, he has experienced three days of amnesia at the full moon, during which he turns into a wolf, so he usually locks himself away in a soundproof suite in the Plaza. Fortunately, he wakes up this time to find that Sue is still alive and well. A powerful bout of lovemaking leaves Tony certain that he has found his mate, and he will do anything for Sue, even kill her if that's what she wants.

This is a very complicated story as though it is from Tony's point of view a lot revolves around Sue. Some annoying things is how much he relies on smells and suddenly he and Sue are one person and can experience each one's thoughts and experiences while they are separated. Luckily for her as towards the end Sue is kidnapped and Tony is able to get there to save the day.

It was alright.

Sequel:
Moon's Web