Thank you for "filling in the blanks". This is a very different picture.
Given that you both have attraction for one another...the things to consider are:
How much do you know about each other, aside from a physical/emotional attraction?
Calling you 'dad' still seems a little "off" to me...unless its an inside joke between the two of you because of the difference in your ages. Please be sure to ask her about her relationship with her father before going too much further.
And about that age difference....10 years or less is usually no problem for a couple to work out. More than a ten year difference means there is a generational difference as well. That can make things harder, but not impossible. If you share similar interests, this too can be worked out.
It may sound odd, but music often becomes an issue in relationships where one is much younger than the other. Find out what kind of music she likes and think about whether you could stand listening to it for the rest of your life.You didn't tell me your ages or the spread of the difference...and I'm taking the "dad" reference as an indication that the difference is significant.
It may be time, if there is no danger of either of you losing your jobs by getting involved, for you both to admit you're in a relationship...unless, of course, there's more to the story and one or both of you is married or in a committed relationship....
I hope I've given you something to think about.
Please click on ACCEPT if I have. If you need more info, just ask.