Haramido Elf

An elf mother and daughter are captured by a group of vile men.

"I don't care what happens to me, just save my daughter!"

The elf mother offers her body for her daughter's sake, and is abused by the men.
It doesn't end with mere rape; her body is drugged and left in a horrible state.
Her anus is exploited, her breasts are turned into cow's milk, and she endures daily rapes by strong men.

Eventually, her mind breaks, and she becomes a sex slave, craving men even when raped in front of her daughter.