Who’s the first to wake up in the morning:
Probably Lily on most days. She’d be getting up for some alone time that she likes in the mornings. She can read and bathe and enjoy the morning atmosphere before starting on her responsibilities for the day (which probably include waking up Sirius). However, if Lily had a ton of homework or is hungover, I think Sirius would always be there to nudge her awake and give her coffee and encouragement.
Who’s the one to make breakfast:
Neither. Lily is a shit cook, and Sirius never really learned. If they eat anything besides cereal, it’s got to be bought from a place where people are employed to cook.
Who’s the one to serve the other breakfast in bed:
I’m going to go with neither again on this one. Lily hates eating in bed because of all the crumbs and is just too stubborn about it to let Sirius live that way either. Plus, I think they both enjoy their ritual of walking to the nearest sleazy diner to eat for the morning.
Who would suggest a quickie in the morning before work:
Both. I mean just look at them.
Who suggests they both ditch work to lay around all day:
Lily would suggest it, but never actually push to go through with it. Sirius, on the other hand, would probably whine until she agreed to binge a tv show and not to leave the blankets again unless she was going to get more hot chocolate.
Lily. Easy. She’s just seen more of them having been raised in a muggle household. If they’re going out to a live show, then Sirius would choose, that’s more his area of knowledge, but Lily was raised on 90s teen flicks and the brat pack.
Who initiates kissing during the moving, thus distracting the other from the movie all together:
Definitely Sirius. Lily has too much respect for a good story to let anything interrupt her enrapturment. She’d probably be annoyed at him for missing and making her miss all the good parts.
Both? I think it’s safe to say that as they’re both independent and individually minded people, they like to choose what they want to eat for themselves. Additionally, they’re probably both too stubborn to cave to the other’s craving and end up ordering from separate places.
Who steals food from the other’s plate without asking:
Also both, but I think Lily definitely does it more frequently. She’s always had the problem of wanting a variety of foods in a meal that she can’t afford or can’t stomach to eat it all at once. So she tends to grab from his plate to appease.
Who curls up next to the other and falls asleep due to a full tummy:
Lily. End of it. The girl can fall asleep just about anywhere and doing anything. Especially when she had a lot to eat.
Who distracts the other from trying to work at home:
Sirius, but with good intention. Lily is so determined to be more than anyone expects of her that she oftentimes overdoes it. She studies too hard, too late, and too often with materials that are usually far beyond the level of material she’s prepared for so Sirius has taken it upon himself to make her relax and remember that she’s good enough as she is.
Who asks to go get ice cream like a five year old:
Lily is always ready for ice cream. So is Sirius, but Lily probably asks more. Sirius just starts walking in that direction.
Who takes pictures of their partner eating ice cream:
Sirius. He’s got to get those insta likes.
Who makes a sexual joke about the dripping ice cream on their partner’s face:
Still Sirius. It’s probably the caption on that insta post.
Neither again. Same predicament as earlier.
Who cleans up the kitchen afterwards:
The joy of being a horrible cook is no clean up.
Who stays up until 2 reading:
LILY ELIZABETH EVANS. She’s constantly in a state of ‘I just need to finish this chapter’.
Who stares at their partner while their sleeping:
While neither would ever admit it because they wouldn’t want to be seen as clingy or emotional, they both do it occasionally.
Who kisses their partner while they sleep:
I think this would only be Sirius. Lily would be tempted, but would be too afraid that she’d wake him up. However, Sirius knows that Lily is much to hard a sleeper for that to wake her.