"55": Is not this the carpenter's son? is not his mother called Mary? and his brethren, James, and Joses, and Simon, and Judas?
"56": And his sisters, are they not all with us? Whence then hath this man all these things?
Matthew 13
I'm pretty sure my Bible says Jesus had brothers and sisters.
Well, that Bible of yours doesn't tell you that those "brothers and sisters" are the sons and daughters of the Blessed Mother. So don't go wagering any dough on your knowledge of Scripture that you can't afford to lose.
By the way, that Bible of yours says that Lot is Abraham's brother, Genesis 14:14, it also says that Lot was the son of Haran, Abrahams brother, Genesis 11:2628. Turns out Lot is actually Abrahams nephew not his brother.