And how high she has the bed..I have mine on two rows of drawers from a water bed my son lost in moving. Lost the water bag, that is, and gave me the bottom of it. It makes my mattress
higher than normal. Plus, I want my quilts to fold over the pillows and hang to the floor. So I would suggest you visit your friend and ask her some pointed questions, then go and measure it yourself.
We used to have an extra long double, there seem to be more and more differences in mattresses every time we checked them.