"It looked wholesome. At first I liked that the girl seemed able to handle herself with a slightly older guy, but then I realized, somebody's training that girl to be a gold-diggin' whore. >:( "

I have not realized that.
Who?

"Mom needs to nip that in the bud real quick. Otherwise, dad needs to step in and lay down the law with his little out of control princess, because this is how it starts! Today it's getting free ice cream with a wink. Tomorrow it's taking a rich guy for all he's worth by pretending you didn't know you were going to his mansion to touch his pee-pee so you could buy those expensive shoes."

If that´s where it ends up then why would mom or dad need to step in?

It would be another matter if she is becoming an unsuccessful whore.