Dreams are always about the person who has the dream. So this dream has something to do with your sister's own need or desire to have a family, or perhaps her need to nurture some male aspect of her life.
Dreams reflect your own feelings and the things that you think about. So these dreams only "mean" what you already know: you like the boy and want to go out with him.
It means that boy has feelings for you, and thinks about you. Or the boy thinks your hot and wants to masturbate.
well it could mean he WANTS to do it...
Your falling in love
it means you need better dreams and that you want to emmbarass your sister
It means he likes you and he especially loves your eye's
usually dreams that refer or involve a death of some sort mean that that person will live a long life.
Just talk to him politely. If he is rude, ignorant, or obnoxious; he is not the boy of your dreams.
This dream merely expresses your own feelings about that particular boy. Your dreams only illustrate your own thoughts and emotions. They do NOT provide any information at all about anyone else's thoughts or feelings, and they do NOT mean that the boy is thinking about you. Moreover, the boy knows nothing about your dreams unless you choose to tell him - which might be rather embarrassing for you.
It means that the boy likes you or he is goin to ask you out
if my sister had a baby boy what would he be to me
No problem, nobody else knows what you dream about unless you tell them. If you are worried by your dreams remember that they are just dreams and you have no control of them so don't be embarrassed if you've dreamt of having sex with another boy or something. It doesn't necessarily mean that you are gay, lots of boys have occasional dreams like that.