She will occasionally fuck my ass, using one of the dildos from our collection of increasing sizes. Our latest and largest is also my favorite because it resembles in size and shape my friend's very big cock. She wouldn't believe that it was possible to deep throat a cock of this size until I proved to her that I could by completely swallowing it. Now, at my instigation, she forces it down my throat before fucking me anally with it.
Sounds fantastic.