Leslie Anne Bishop

Mrs. Bishop is married to the Head of the Bishop crime family. You can also speak with her in regards to Vault City (where she is from). Be nice to her and she will provide you with the combination to her safe that has some really nice things inside.

(Note: I haven't confirmed this personally but I read that if you sleep with her too many times, Mr. Bishop will find out about it and the whole place will go hostile on you.)