in my expertise' lol, pre-cum does not include semen only if you havent peed before the last time you came. (aka the night before, you jacked off and then you didn't pee all day) however, that is unlikely so you really have nothing to worry about.

oh and dont use two condoms. it breaks more easily & make sure you either get lubricated condoms and/or lube. me and my boyfriend bought some and it works wonders. & if she took the EC, tell her to watch closely for her period if it doesn't come in a month after you take the EC pill CONTACT YOUR DOCTOR RIGHT AWAY

hope everything turns out well.

Happy trails :]