It honestly all depends on what your
endgame with her is.

Are you just looking to
"hit it & quit it", or are you planning to stick around.
If you just want to hit it then:
You've simply got to weigh your wallet against what you figure you'll gain from fucking her.
If you feel you might want to stick around, well then:
#1.
Ask her if she is in need of or wants your assistance.
(Most women will probably feel uncomfortable taking money from a man they just met).
#2. Since you
JUST met her,
(and don't know if she a responsible person), let her know it's no big deal but that it
IS a small a loan.
#3. Fully expect to
NEVER see that money ever again.
#4. Do not hold this event over her head as a testament of her financial character. However; pay close attention to her spending habits and thriftiness.
Finally, if you do offer to pay and she accepts...
#5. You'd better make damn sure well that
YOU have enough money in your account to cover the transaction before you offer to cover the expense.