NAME_1, 12, and NAME_2, 10, are visiting their aunt NAME_3, 30, on the small farm where she lives.
NAME_2 finds a small framed picture of NAME_3 and asks her about it.
In the picture NAME_3 is smiling and looks exhausted, she is on her knees and there is a goat on her back. On closer inspection, it's clear that the goat is actively mating with her. 
When NAME_3 sees the picture, she laughs and recalls the day fondly that the goat coupled with her.
Add dialog, and sensory imagery.