For years? How many, 0.000000001 years?
This kind of abuse rarely involves simple sexual contact. There is generally manipulation involved, including threats to disfellowship the victim for "slander" if they blab. They weasel their way into hounding calls with minors, and sexual contact is almost never without coercion. They are threatened with their lives, and if they don't comply, they could be in for "brazen conduct" or given more severe requirements. Or, they might have done a little "sin", and if they don't give into the sex, it will be treated as a big sin. "Privileges" are threatened. Which is significantly more serious than merely doing consensual sex.