Go check out your babysitter

You remember that Sarah is sleeping here since your parents are gone for a while. They asked her to watch the house and keep an eye on you and your sister, and she's about 40 and really hot.

You quietly walk to the guest bedroom and open the door, and you see her laying on her back on the bed in a long dress with nothing underneath, so you can see her sensual curves and her huge breasts and the sight turns you on even more. Her legs are spread a little while her arms are relaxed against her sides, and she sleeps deeply, snoring as her chest rises and falls.