I'd say late 30s to early 40s after seeing you without glasses on. You have a great complexion and I don't see many age marks via skin damage from the sun. Continue whatever you're doing to keep the fountain of youth alive!
Judging by what I can see of the back of her hand, not over 50, by when the veins start to show.
Judging by the slight sag in her top, not under 20.
That gives 20 to 50 as the outside parameters.
Looking closely, I reckon closer to yhe upper limit. How about 45?
How lovely and vibrant!!
My personal philosophy is to never ask a woman her age or her weight... ...
Looking good!