Regulus

Regulus is alive and he comes to Grimmauld Place, relieved to find that his mate (Severus) had turned to the light like he had. But will Sirius and he ever be close again? Will Lucius and Narcissa understand him once he explained his reasons for hiding. (To destroy Horcruxes.) And will Severus ever forgive him for abandoning him like Lily had? NO SLASH AT ALL!