"Digest me." you requested.
"You want me to digest you?" your sister asked.
"Yes." you said.
"If that's really what you want," she said, "I'll do it."
Her stomach acid starts rising and wastes no time in dealing with your body. Your flesh is slowly melting away but somehow it feels nice. You enjoy the feeling of getting acids splashed onto your body. Over time, you are slowly turned into a goopy mess inside of your sister's gut. The other's watch as her belly gets smaller and smaller. You pass out after a while, happy to be such a good meal for your sister.