Do you know of any sexy mulatto girls with big breasts and nice curves? The only one I managed to find was Amber Easton. I'm thinking a bit in those lines but the breasts doesn't have to be that big. C and above in fine.
If you use terms like bi-racial and mixed, there's no way to tell if they are half black-half white, half asian-half white, half black-half latin and so on. People might get confused.