Can you figure this out?

A girl has 5 siblings (6 Children total). She has 2 sisters and 3 brothers. Her mom has given birth/been pregnant 2 times. Her mom has 3 children and her father has 5. Her father has only “fathered” 3 children yet all 5 of his children are his.

*there are no twins or multiple births


I feel like I am leaving out a "key" piece of information, but maybe you can figure this out.

So this is all I can come up with...

The mother had her first child from a previous relationship. She then met the "father" who had two children from a previous relationship. Together, they had "the girl". Then they adopted 2 children. And then the father adopted the mother's first born so that he/she would be "his".

Yes? No? Maybe?

Cookie Monster, Not bad, but not right..lol If they adopted 2 children then the mother would have 4 children though. So there is one hole in your answer.
I like your thinking. I will post the answer after a couple people try to answer.

One scenario:

Mom adopted one
Father adopted two, bio-fathered one
Mom & Father met; bio-partents of two
Total 6 kids;
5 kids are legally children of the father
3 kids are legally children of the mother
All six are siblings

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Completed Beck Program-day 27. 15 to go. Keep going!

3 of them are half siblings?

OK Here is the answer Bill Blue eyes is pretty much right...

Mom & Dad had 2 bio children
Dad adopted 2 children
Mom adopted 1 child
Dad fathered 1 child (Different mother)

I like riddles