I think community service etc as punishment.
She isn't a proper 'peado' the age gap isn't big enough for that, as 14 year olds can look older. However, this still seems wrong because not only do I think 14 year olds and 20 year olds shouldn't be having sex with each other but the mother paid the babysitter to take care of her teenage (take care, har har) and, well, she sort of violated the womans trust and abused her position.
If there was alcohol it would be even worse, but apparently there wasn't, so...