Poseidon's Long-Last BabyGirl ||1D Vamp/PercyJackson/Supernatural a.u

Being a 17 year old girl, and just finding out I have a twin brother out there...Percy Jackson...I've seen him maybe once or twice, but we've never really knew we were siblings. I always had a thing for him...

but now tht Ik my twin (or shall I say Triplet, because me and Sam are, you know, already (thought)--we're "twins") I've been with my twin brother Sam, my big brother Dean, my big sisters Kayla and Kelly, and my Little siblings, Maxwell and Balanna.