I can't remember the name of the story you're talking about, but I do remember it. Here's what I do remember:
The main character is former military, who owns/operates a space freighter, with a cat girl as his engineer. She was in the service with him. He has an ex-girlfriend, who is still in the Navy and is the captain of a local area ship that tends to harass and obsess over him in an unbalanced sort of way. He has a friend, who works on a local space station and she is a kind of vampire species and he helps hook her up with another friend who was a ship captain, but was injured and had to retire. He also has a mother who is some sort of famous pirate/mercenary, I think? He and the cat girl fall in love, plan to get married and visit her family on her home world, where her father is some sort of high general in their military. I also remember a terroristic attack that takes place at her parents house and she also has a younger and equally hot sister.
I remember a few other minor details, but as I said, not the title. I hope someone remembers it, because I'd like to see if the story was ever finished, because I recall it being a fairly good read.