The Alpha prince stepsister for a mate

Xanders pov "Xander stop this"! my dad yells at me as I slam the door in his face.Im so mad right now" it doesn't matter he doesn't get it because he found his mate on the day of his birthday so he doesn't know the feeling he doesn't get it.My mate should be in this packhouse while I was in thought something my dad said caught my attention, maybe she is at school maybe she doesn't live in the pack house and then that unlocked some hope in me that I didn't know I had yeah maybe your right maybe shes at school. So I put my clothes on in a hurry for school and I run downstairs to eat breakfast and then I run into someone and we fall down the stairs and I land on the ground with a hard thud and it hurt like hell and I don't even have a second to recuperate before a elbow landed into my stomach I look to see the eyes of my stepsister her hazelnut brown hair falls in front of her face and lands on mine, l look into her eyes, and for some reason she looked beautiful in the position she was in and thats when I snapped out of it what the hell got into me why was I thinking something like that this girl is not pretty she's ugly no one wants her so why did I think something like that she gets up in a hurry and she looks at me with fear in her eyes of what is to come for knocking me down but as she trys to leave in a hurry I stop her with my body which makes her bump me again, as I stand there in front of her she keeps her eyes on the floor and then we hear two voices behind me which makes her jump and when I turn to look its then I see my Beta and my Gamma.