Husband, I have to agree with HFF. Who knows this may be her way of reaching out to you. I see it as a huge positive that she wants to spend adult time with you even if it is with her mother. It seems like it has been a long time since she has extended you an invitation! Go for it! Who knows you she may get a little intoxicated and take advantage of you!
Tell her that you were having a bad day with trying to quit smoking when you told her no. You could say that you have changed your mind and you think a night out with her and her mother would be great!
Just my 2 cents...
PS I'm very proud of you for your success of quitting smoking, you are getting there!
Life's challenges are not supposed to paralyze you, they're supposed to help you discover who you are. -- Bernice Johnson Reagon