Mira Lynne isn't exactly a milf but seems to have a bit of a bubble on her. I've never seen her so I can't say for sure but some have described her as thicker all over.
Never saw Joanna but the best ass I ever saw on an Asian was Gina from years ago. Not overly wide in the hips but her ass stuck straight out...like a basketball cut in half.
Finding that again is like looking for a needle in a haystack!