It will depend on the specific laws in your location, but probably not. Most places have the age of consent set at 16 or 17.
Dating is not illegal. Sex is. Sex with parental permission is illegal fo the 18 y/o guy and the parents who would be charged with child endangerment.
The adult would find itself in trouble with the police, social services, and especially with the parents of the other child.
Not for dating since there are no laws for that but there's a big difference between 13 and 19. 13 is still a child. Her Parents would have to agree to it. There are laws regarding sex and for a 13yo child that is out of the question until she has reached the age of consent in her state. The adult dating her would also have to remember how easy it is to be reported for statutory rape.
when the two parents that are dating become married and are legal
No.
because they will miss there child
A foster child.
Yes. It would be child endangerment, contributing to the delinquency of a minor, serving alcohol to a minor and any number of charges, depending on the state, province or country in question.
Dating is not illegal (there are no laws regarding dating). If the minor's parents are okay with you dating (and frankly, I don't any parent who would let their 15-year-old child date a 20-year-old adult, but maybe this minor's parents would), then you can. If they aren't okay with it, you can't (parents have the right to determine who their minor child is and isn't allowed to spend time with). For a 20-year-old to have sexual contact (which is not limited merely to intercourse) with 15-year-old is illegal. It's a felony.
If the child is a minor then they are the responsibility of the parents and it is up to the parent to either deal with their child's problems by setting down rules of the house. If the child consistently gets into trouble then it is up to the parents to find a program or get their child to a child psychologist for help. If a parent has done all this and the child still gets into trouble with the police then it is out of the hands of the parents and Child Aid will have to cope with the problem. If the parent has made no attempt to curb their child's poor behavior and let them basically run loose as they wish then yes, the parents should be accountable for crimes of their children.
Yes, if you have parental permission. They are still responsible for the child. But they can determine where the child lives.
he was a troubled child and didn't listen to his parents. he got into a lot of trouble but was very sophisticated.