No, they can't throw you in jail. You're both of legal consent age.
nope.. he has to be over 18.
They both can get arrested for first having sex when minors, two for making her pregnant.
Yeah.
Yes.
yes
If his balls have dropped
Yes. The 19 year old is an adult and the 16 year old is a minor.
No the age of consent is 16.
With parental permission she can.
it's possible, but not likely.
She has a baby.
no, you have to be 18
Yes. It's called Statutory Rape.