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Taking care of a ten year old is hard. Taking care of your ten year old brother, whom you gained custody of because his parents disowned him due to him turning into a werewolf, was even harder.
At the ripe age of twenty one, Sirius had to care for two lycanthropic, stubborn, ill-tempered boys. One of which he hasn’t seen for nearly seven years. At first it was difficult, Regulus did not care for any help or company at all- if Sirius tried talking to him in any fashion, the kid flipped out. It was as if he saw him as a stranger or even worse, their parents.
It took a few months, a particularly bad full moon, and a ton of patience but Regulus slowly become comfortable around the married couple.
Now, Regulus has been in their lives for almost a full year, and their relationship couldn’t be better! The young werewolf was set up to go to Hogwarts this coming September, with Remus as his DADA Professor, and while Sirius was nervous to send both his boys with ‘furry problems’ off two hours away- he knew that Regulus was the safest he could ever be with Remus.
In fact, Regulus actually preferred being with Remus over Sirius. If Sirius was the professor staying at Hogwarts, there might have been a million and one problems (including a war) but Remus? Sirius has no doubts in his mind about the wellbeing of his baby brother when Remus is in charge; and this morning seals the deal completely.
**
Sirius woke up late into the night to an empty bed, which was odd, normally he was the one out of bed at the oddest hours of the night, not Remus- especially not so close to the full moon. Two days before the moon means Remus is either sleeping heavily, fucking Sirius into the mattress, or eating the entire kitchen. But the other two only happens when Sirius is awake, so it’s odd for him to not be in bed while Sirius is also in bed.
“Rem? Are you in the loo?” Sirius called out, hoping his husband will respond from their ensuite.
Moments passed. And nothing.
“Well then, guess I’m going Moony hunting.” Sirius mumbled to himself as he stumbled out of bed, wearing nothing but Remus’ old sleep pants from school- which are still too big for Sirius even now. While half asleep, Sirius trudged throughout the house, starting with the kitchen, then the library, sitting room, guest bathroom, garden, balcony, and even the carport, but he couldn’t find Remus anywhere. He was starting to get a little worried as he headed to the last room in the house- Regulus’ bedroom- because he had little hope to find the werewolf there. Sure the two had a wonderful relationship, and Regulus always went to Remus to solve midnight problems, but HE always went to REMUS, not the other way around.
Of course the older man didn’t mind it at all, it warmed his heart and gave him a blissful feeling of domesticity each morning he woke up to find his eleven year old brother sandwiched in between himself and Remus, sleeping calmly when he knows for a fact he rarely ever gets a good nights rest. Regulus knew that neither men were bothered by him showing up at odd hours in the night, and asking to sleep with them, so it was very worrying to picture any reason behind why Remus is in this room and Regulus isn’t currently being cuddled into peaceful dreams in Sirius’ room.
As he walked closer to the door, the slight gravel tone to his husband’s Welsh accent became audible, “if you stretch each morning and night, Cub, the cramps get easier to deal with, and once you’re old enough for wolfsbane, that will also help tremendously.”
Oh.
That’s why Remus was in Regulus’ room for a change, the poor kid was probably in way too much pain to get out of bed, let alone walk across the house to get to his guardians.
With a guilty sigh, Sirius gently knocked on Regulus’ door and waited until a soft ‘come in’ to enter the room. The image he walked in on was maybe the sweetest thing he has ever seen; laying in the small twin sized bed, was Remus (who had part of his legs dangling off the foot of the bed) and laying smack dab on top of the giant, getting his hair played with, was a pouting Regulus.
“Hey Mon Ètoile, what’s going on? Why are you two having a party without me?” Sirius chuckled, trying his hardest to hide how much he dreaded hearing the answer. When Regulus only shrugged and hide his face further into the curve of Remus’ neck, the werewolf took it upon himself to answer, “He was in a lot of pain because of the upcoming full moon. I heard him whimpering when I got up to wee, and I smelled how distressed he was, so I came in here to check on him. I gave him some pain potion but it’s working as good on him as it does me during this time so.” Remus shrugged, twirling a small black curl around his pointer finger.
While it wasn’t the best of news, the explanation still managed to calm Sirius down quite a bit. Regulus wasn’t in any type of danger, he was just in a lot of pain. Pain they all three can handle and make better.
“Well lucky for you, I know the best remedy for pain. Worked on Moony for years! Wanna hear it?” Sirius asked as he walked close enough to the bed to sit down on the edge, close to Remus’ hip.
“… it’s not something stupid is it?” Regulus mumbled, resulting in a laugh from Remus and an exaggerated gasp from his older brother.
“No! I think you’ll actually love it. Ice cream, hot chocolate and some muggle cartoons. What do you say Mon Ètoile?” Sirius was now gently rubbing his brother’s back, trying his best to not jostle him or make any cramping worse.
“Oh that does cure a lot of pain. I think you should try it cub.” Remus agreed before placing a kiss on the top of Regulus’ head, effectively making Regulus relax more and melt Sirius’ heart.
“Fine, but I pick what we watch and I get carried down the stairs.” Before Regulus could even finish his terms, Sirius was already out of bed and in the process of picking up his brother and adjusting him to carry bridle-style. “Oh of course, can’t have the little prince move a muscle. This night is suppose to relax you, not make you work.” The older brother scoffed playfully, walking out of the room and heading towards their sitting room downstairs.
Hours passed, and neither of the three boys managed to get any sleep, but after two rounds of Hot Chocolate (followed by a round of tea), THREE rounds of ice cream, and a full season of Phineas and Ferb, the young Werewolf managed to forget about his pain and fully relax into the only two adults he ever could trust.