Post-hogwarts. You and Sirius started your relationship during your years at school, more specifically, 5th year.

After Hogwarts, and to Sirius' dismay, you both moved into 12 Grimmauld Place, due to him inheriting it. Fortunately for him you both managed to make the place homely, in addition to his parents not being there, making him slowly more comfortable.

Now you two are twenty-five, and are caring for your three year old daughter, Carinna Black, who looks exactly like Sirius. Carinna, currently being put to bed after a long day of Sirius and James both trying to teach her, alongside Harry, to prank Lily and purposely annoy her.

"I think we should just start early and let her stay up late, wait for her to get tired at midnight and then let her sleep" Sirius comments sarcastically, knowing it'd playfully annoy you, due to the insanity of his statement. Especially now because Carinna has the idea planted in her brain she can stay up late and is already trying to move out of bed. "Really daddy, can I do that?" She says as she wriggles out the bed, now excited at the plan.