Is it illegal to date your parents?

In a Nutshell: Sex between an 18 year-old and a 15 year-old is illegal in California, meaning any touching of “private parts” of either, even with consent of both parties (and perhaps even the parents of each teenager) is illegal in California because the age of consent is 18.

Can your parents legally stop you from dating someone?

The only option they have against him legally is to get a personal protection order order, or a restraining order against him. They can stop you from seeing him with a restraining order, but that is about it.