She is toxic and pushing a toxic narrative . There is no chance her thighs are fitting in a size 10. It’s not happening. Anyone who needs to size up as much as she does is not telling the truth about her size! It’s evident by how tight her clothing is that she squeezes herself into the size down.
Case in point - she tried on a maxi leopard skirt from TU a few weeks ago, maybe last month, she had the 12 on. I wear that in a 10. It’s very generous in its sizing and not very stretchy. Unusual for a stiffer denim to run large. Normally I would have been a 12 but I had to size down to a 10 as it was generous. She is in the 12 and it’s not exactly roomy on her