"Hm, well, I haven't seen any cases like that. Just a big ego." Luna said in her usual innocent, airy tone, though a glint in her eyes let Hermione know that she got that a swelled head was just a metaphor and she was just teasing at this point.
Luna herself was loving how intense this session of shagging was. Usually it was more explorative and they took their time. But this one was just raw shagging and she found that she loved it.
Hermione did not have to ask long as Luna's orgasm tore through her. She rode Hermione desperately as she came, Eventually slumping over so her head fell on the older girl's shoulder, Luna's hips still moved on the girl's hard cock, not wanting to finish yet, just needing to regain her ability to breath. "Bloody hell Hermione," she breathed, "It may be only a spell, but your cock is amazing."