Actually, when was the last time we could get a futa pregnant? I think it was Evergreen's tanuki daughter Meira, and that's that.
Which is a shame, since Arona's pregnant bust is top-tier stuff. Seeing a dominant girl's dick bend under the weight of your progeny, as if hammering into her that it is nothing more than a reminder, an ornament, of the life she used to lead. One where she was a top dog, the breeding stud, that topped anyone she saw fit: alas, now she is our wife, made to be bred, cherished and, most dastardly of all, loved.