A lot of omegaverse touches on female alphas having cocks, but the only ones I have read that have explicit, sexy smut featuring a female be-cocked alpha have the partner as a woman as well (also something I love to read, but not the focus of this prompt). I would REALLY love to read a less conventional sexual relationship:
Omegaverse. Sherlock (omega male), and John ("Joan"? alpha female). In the grand tradition of omegaverse, Sherlock's got a delightfully self-lubricating arse and Joan has a cock - design therein is up to the writer. Sherlock is his irritating flouncy self, acerbic and trying to impress Joan at the same time. Joan eventually can't help herself, much to the delight of sneaky seductive Sherlock. Would prefer that Joan be the penetrating partner, at least at first.
Omegaverse genderswap (male omega Sherlock, dominant female alpha John)
Omegaverse. Sherlock (omega male), and John ("Joan"? alpha female). In the grand tradition of omegaverse, Sherlock's got a delightfully self-lubricating arse and Joan has a cock - design therein is up to the writer. Sherlock is his irritating flouncy self, acerbic and trying to impress Joan at the same time. Joan eventually can't help herself, much to the delight of sneaky seductive Sherlock. Would prefer that Joan be the penetrating partner, at least at first.
Please, please please?
(Please? :D)