I'd say older than 41 but I'm crap at telling ages. Had great fun with her as per my review also.
She was making a big deal about her 40th in 2014, going out with her friends, not available on a certain day, excited to join the mature ladies group and guys who prefer 40+ men etc etc
Could have been all hogwash but I would be surprised if she were to make that kind of noise over say 43 or 45. IMHO