hc that peter was the first person to kiss regulus.
they became friends bc regulus caught peter smoking weed outside the herbology classroom and promised to never say anything if peter shared his joint with him
so they start smoking together whenever they have free time, or during their study breaks (the marauders are permanently confused on why peter decided to care abt his divination marks all of a sudden)
and they end up having deep chats abt how regulus doesn’t really give a shit about blood purity but that’s what he’s been brought up to believe in so it’s hard to unlearn what’s now unconscious behavior.
how peter feels like he’s not as good as his friends and how he feels like everyone sees him as the ‘extra’ to the marauders that they bring along due to pity.
cue the sexuality crisis of an average teen.
peter isn’t sure what being queer actually means, he just assumed he’s straight because what else is there?? and well if he took a peak at gilderoy lockhart without a shirt on, that was his own business.
and while regulus has always known sort of that he’s gay, he’s just not willing to accept it unless he actually tries something (internalized homophobia king). but he can’t try because if his family found out, he’d be worse off than sirius was when he was disowned
(sirius had a loving home waiting for him, regulus does not)
so regulus and peter make a weed laden promise to be each other’s first kiss, to just know yk?
and they do, and it’s beautiful. but it’s an awkward, ‘you should never kiss the friend you’ve learnt to see as a sibling’ kind of kiss.
but it’s beautiful all the same, because despite what they may have thought, they don’t hate it and their friend is actually quite a good kisser.
flash forward to maybe 3 years later,
established gilderat (or partyvan) and moonwater (or jegulus, OR moonwaterchaser) and it gets brought up in a trivial game of truth or drink.
and boy oh boy, not only is sirius about to go into a catatonic state, but remus and james are SEETHING, not in a ‘pete, a word.’ way
more like a ‘i can’t believe you’ve made out with my husband and now i can’t stop thinking about the fact that he has touched someone else and now i have to establish dominance so you KNOW you will never be able to compete with me’ silly way.
and peter and regulus find this HILARIOUS. gilderoy’s honestly just there for the ride, boy’s got such an inflated ego that the fact that peter kisses regulus doesn’t even register in his head.
meanwhile regulus is trying to fiend off two overly clingy, man child husbands who dont want to let him go because all of a sudden they’re second guessing whatever the fuck happens when reg goes to peter’s for a smoke session and vice verse.
