She says she does climax now using the toys (after a lot of hard work which she says isn't really worth the reward

You stated that she has had her hormones checked has she spoken to her Gyn about the problem. I sorta know this is going to sound wierd and I do not know the tech terms but my doctor explained this to me once. Something about the muscles in my uterus that cause orgasms were out of shape and that was why it was so physically hard and hard work to orgasm. They told me how to do a exercise to start tightening this muscle. It is simular to how the woman in Japan are trained to Milk a man.

Juat a thought