Use her pussy.

While you could fuck her ass right now, you don't feel right about it.

You're still going to fuck her- just not there. You aim your cock at her exposed pussy and slowly make entry. She moans a little, which is a good sign.

Once you are fully-inside of her, you feel her pussy clench a little. If she's truly out of this, it must be a reflexive action.

You take her ankles and pull them back up on your shoulders, giving you a little more leverage.

You start to get a good rhythm as you fuck her now. Her prone body just lets you fuck her to your heart's content.

Not wanting to be a *complete* jerk about this, you reach down and start to rub Betty's pussy lips. You play with them a little, uncovering her clit. Thank you, Internet!

You feel her pussy tense up a bit now, but don't let that stop you. You softly rub her clit now, pressing on the 'button' to stimulate her even more.

Betty mutters something, seemingly-still asleep.

Taking full advantage of this situation, you reach forward with your other hand and play with her breasts. They feel so good!

All of a sudden, you feel some juices push out of her pussy, soaking your groin and the area around it. She came!

As you feel your own orgasm building, you pinch her clit a little, getting another reaction...

A bit of juice shoots out from just above your dick, spraying you a little. Thanks to the Internet, you know what that was!

Speaking of which, you are nearly there. Might as well cum too!

You grunt as you shoot your biggest load yet into her pussy. You feel her clench a little near the end, meaning that she came again.

'At least she enjoyed it,' you think as you exit.