Can a father stop an adult man from having sexual intercourse with his 16-year-old daughter? The
answer is no, according to the Massachusetts supreme court.
Maybe the court accurately followed the letter of the law, I hear of courts issuing restraining orders for frivolous reasons all the time. But apparently the court will not accept the dad's opinion that the relationship is harmful.
The California age of consent is 18, so maybe a dad would have more luck here.