"Thunder thighed" is a very good description, her weight seems to balloon up and down too. I don't make a regular thing of seeing her but she's a 'fixture' among service providers (handy when I'm working in City too).
She's VERY good at massage, btw. She'll take the money for extras but tends to quote silly prices as she think she's all about massage and health. That said, I've taken some extra notes a couple of times as I just had to see the baps unleashed and I was very glad I did too.
Good facilities in her flat too.