My question is ,, if I marry a woman, who has a older daughter, will I half to
bring the older daughter back to the US,, and support her , let say age range
18 to 20"s.
A.
A daughter 18 to 20's and same for son...
What has been the discussion between you and the mother of these two?
When you have discussed this in depth then you will know if her daughter and son
will want to come to U.S. or stay where they are.
"Will I have to support her?" sounds like you are not willing to take on this
responsibility for the daughter let alone the son.
What do you think a woman with a daughter and a son need?
They need support. Can or will you offer it?
Imagine the son who has you as a father that does not want you but took you as a package deal to get his mom.
There are women on these sites who have children who are old enough to be on their own. Look for them.
Do not try to justify supporting a mother just to have her with her children along for baggage.