The person who had sex when they were 13 years old. Or the person who didn't use a condom. Or the person who didn't get the morning after pill when the condom broke. Or the person who didn't get an abortion. Pretty much anyone who doesn't avail herself of these options is pretty much negligent.
The mother is criminal negligent for allowing her to date an 18 year old and letting her 15 year old get pregnant. And 15 may not be allowed to marry without a court order, depending on the state they are in. And depending upon the state laws, the boyfriend may be liable for statutory rape charges or criminal sexual contact charges.
no your both are minors
yes
They will have a child to raise.
No.
She has a baby.
Yes.
Tell your parents!!
Yes, they can, but as a woman gets older, it becomes harder to get pregnant, but that's around 60 years old, so a 40 year old woman could get pregnant.
However old it is when it gets pregnant.
yes.
probably, yes