Ok, Danno has a question...

[Skulhedface]

2 girls? That hate each other? Speaking from the testosterone, there's not much that can go wrong in that scenario! They might find out, they might start fighting over humping rights, which of course means humping competition.... Ya see where I'm going with this?

On the flip side, they could find out about each other, get pissed off at YOU for even thinking about diddling the other, and both drop you like a bad habit.

At the very least, hope for the middle ground, where they find out about each other, one of them bows out, making the decision FOR you.

Chojin's right about it being Girl #1's problem, but also, you can't completely avoid blame. After all, you DID give them both the lovin's. Girl #1 would have no reason to HAVE the problem had you not. That's the way I see it.

Advice on this subject's a bit hard to give. It's been a little time since I've been in the situation myself, and yea, being single for such a long time after being with someone for such a long time may be clouding my judgement.

So umm... Talk to one, bang the other. I'll be more helpful if something more comes up.