Some definitions of jealous/jealousy:

~Protective of one’s rights or possessions
~Inclined to suspect rivalry
~Vigilant in guarding something
~Intolerant of disloyalty or infidelity

I think you have every right to feel what you're feeling. Her behavior is inappropriate.
Harmless flirting is one thing, but to go as far as to include discussions of sex, (no matter about what), is taking it too far.
Perhaps, if you were to discuss your reasons for feeling as you are, (maybe attempt to guide her to view her behavior in role reversal...?).

Jealousy is a natural emotion, however, as it sounds in your case, you don't sound as though you are the "jealous type", (meaning suspicious and actually creating issues due to your inability to trust?, which can lead to possessiveness/obsessiveness...etc). This doesn't sound like you. You are more than willing to be receptive and to actually meet this new guy friend of hers, (pretty accepting of you, if you ask me).

I'd definitely go through with meeting this guy and see where that goes.

I sure hope this works out for the both of you.


Shangrala