Endearing

Sirius isn't killed & Sirius's family wants a heir, but refused to accept Harry as his heir. So, he decided to forget about the whole pureblood thing & he wants the only person he fell in love years ago. Severus feels trap & wants out of this immediately. He has no choice to get out of this submissive role, but he can't escape out of this. Warning: SBSS, Mpreg, HPDM, HGRW