True, however you obviously can’t say this is the same situation as a 50 year old man molesting a young girl. More a case of horny teenagers and irresponsible parents.
A 17 and 18 year old or a 12 and 13 year old, maybe. 18 and 12 is a young adult male taking advantage of some dumb kid who just sprouted titties. Six years is a huge difference at that age. If that girl has any kind of father the 18 year old should be in fear of not seeing 19.