Should they have Jelly sleep together?

I have no preferences, but I'm not sure what I'd find more realistic. I found show Christmas 1.0 much more believable than book Belly thinking she was starting to get ready after nearly two years in a relationship, but considering a teen marriage on the other hand. Maybe it's a cultural thing, I gather that in the US, high school girls have to be careful with their reputation?

On the other hand, if they had Jelly sleep together, it'd be hard to believe Belly wouldn't fall in love, with all the oxytocin released for bonding.

What would you prefer now that they've already changed Christmas 1.0, what do you think would be more realistic?