While I see your point on this issue, don't you think you are a bit inconsistent in your position?
First you argue that @Jenna is wrong in belting her nieces.
Thenn @Angelina observes, that a young man continues to date @Susan despite having a long distance relationship for much of the time and despite not having been able to have sex with her. To my mind, this shows he is not superficial and really interested in her as a person and not just quick sex. Or in other words, that this could be considered a stable and ongoing relationship. According to @Jenna the condition for being allowed to have sex. So when @Angelina points to that this is wrong again? Why?
And if you give @Angelina the benefit of the doubt (that she is who she claims to be) then she is roughly the same age as @Susan. Two girls talking about at which stage in a relationship sex should be allowed. I don't think this is neither unusual nor wrong.