No one could argue it wasn't a bit unconventional for an unmated omega to share her flat with an alpha. But Theo’s propensity for wandering into her bedroom uninvited aside, Hermione and Theo have a perfectly workable system in place. Hermione has her heats at the Ministry-run clinic. Theo sneaks off to his mate for his ruts. And their flat is blessedly sexless.
Correction. They had a perfectly workable system.
