Ok. Here's my thought on all of this. Well, actually my dad's. He's a smart guy.
If you can't handle the consequenses that come with having sex (ie: pregnancy) then don't do it. Or at least be very safe. Like having your girl on bc, and still using condoms. Every time.
The morning after pill is quite effective. Especially in the time frame that she took it. So I think ya'll are safe.
But remember, "when you whip it out, wrap it up".
Good luck!