… not that feeding off that experience wasn't equal parts frustrating into the mix, of course, because there was a time Nimue would never have been able to pin Merlin in place like that, and so naturally she went to right the situation and was confronted with her new form all over again, struggling against him in the way lovers could, asserting positions rather than rejecting the intimacy altogether... and finding alternatives when that failed, smacking his hand away from her jaw and replacing hers on his, letting the other hand sprawl across the base of his skull where it could try to dictate angle and pressure more freely.
And if Nathan had, at least, had a voice there to be swept away, then Enfys... not so much, caught up hopelessly in the rush of unaccustomed bodily contact and beneath the force of Merlin's fully-focused will (which was a mostly-new experience, because it had never been focused on anything other than Arthur before, and this was naturally a completely different experience).