Tracy stays for more, or has to leave?

As you fall back on the couch, nearly exhausted from this performance, you watch as Tracy and your wife continue to kiss and lick your come off each other's faces. But then Tracy looks up at the clock and states "I have to get home before my husband does", and quickly jumps off the couch and dresses.
When the door closes behind her you glance back at your wife, and she has this new and exhilirating look of lust in her eyes. She wipes your remaining come off her face with her fingers, and slowly places them in her mouth. And then she asks you. "Do you want this party to continue?"
"How?", you say.
"Do you remember Cindy?"
"Our babysitter? But the baby is at your parents this week. How are you going to convince her to come over?"
"Well, she did say she wanted to try our pool sometime, if it was O'K with us. And, the last time she stopped by to return that book she borrowed I was out back tanning, and I noticed how she was looking at me in my bikini. If she thought you were not home I might be able to get her juices going. You could hide in the bathroom and keep an eye on us. Then join us at the right time. What do you say to that?"
Damn. If only you knew your wife was in to this years ago.
What do you say?