I think my sister is gay.whats your opinion on this?

[cutie chica 69]

okay so i have a youngercsiser who never ever mentions a boys name. shes kinds shy but i still think its wired a boy is never mentioned. she stays up asll night on the phone with her female friends and from the other room it sounds alot like shes flirting with them. i dont kno if she scaredto admit it or wat. i feel a wierd sorta tightening feeling when she hugs me kinda like i do when im with guys who are interested in me.