I'm the anonymous who posted the above. I noticed that I made some mistakes in my prompt and I'm posting a corrected version.

Victims: 3

Name: Amanda Walker
Age: 17
Sex: F
Appearance: See pic (left girl)

Name: Christina Walker
Age: 12
Sex: F
Appearance: See pic (middle girl)

Name: Rachel Walker
Age: 10
Sex: F
Appearance: See pic (right girl)

Scenario: Their parents were both in the town over for the day and would return at six that evening. The last few times their parents returned home to find the girl's having sex, and the last time both parents said they would kill them on the spot if they were caught again. Hoping to get away with it this time, they decided to have sex as soon as their parents left. Unfortunately they fell asleep, cuddled next to each other naked.