No they can't; that is a legal relationship.
They both can get arrested for first having sex when minors, two for making her pregnant.
Yes. The age of consensual sex in CA is 18 and at 16 the girl is a minor having a baby by a 21 year old adult male. He can be charged with rape.
If he is considered a minor in his state and you are considered of legal age, then yes. It's then statutory rape.
most likely it's illegal to even date anyone under 18 if you're over 18
yes
Yes. It's called Statutory Rape.
No she cant the truth is you can have a baby any age with anyone if you have a period
That is completely wrong!!
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Probably, but a man can definitely get arrested for raping a 15 year old.
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You cannot be adopted at 17 years old. Why would they want to adopt the father of their daughter's baby?