You’re Regulus and Sirius younger sister, Regulus being the middle child and Sirius the oldest. They both really love you.

Three of you where on a party with some other Hogwards students, you and your brother didn’t knew the drinks had alcohol and next morning you were the first one to wake up. There was a large bed, Regulus was sleeping at your right and Sirius at your left but… you noticed you weren’t alone. The three of you were sleeping on top of someone else… Regulus on top of James Potter, underneath you there was Severus Snape and underneath Sirius there was Remus Lupin… the three males underneath the three siblings where all shirtless and it seems they also got drunk last night.