Hi Nikki
To answer your first question, are you a lesbian, the answer is: why the hell should you care, fact is, you are in love with somebody and apparently the other one with you, the only thing what matter is that the both of you are happy.
I think society will see the both of you as lesbians and depending on where you are living it can sometimes be a struggle or not.
Most important is what you said before, you're a lucky gal and why would that be spoiled by a label?
For the photo's, I can imagine that your spouse want to get rid of her formal life, because it was painfull, and wants to get rid of her pictures from that painfull period.
The good news is, you love eachother so much, so there will be plenty of time to make new photographs where you both are happy on.
This is the answer of a 30 years post op who also is to be considered as a lesbian and still thinks that life is great and worth living the way people feel comfortable with.
I think your partner is a lucky gal too with someone like you on her side.
Enjoy your love and your life honey, whatever it's called by a label.
hugs
Annette