AP-169 "Spank the butt" unexpectedly leads to a massive soaking! My daughter was an extreme masochist!

As my daughter reached her rebellious phase, she would come home late at night and mock me. She did whatever she wanted, and I had enough! Finally, I snapped and punished her with a 'spanking' on the buttocks, but she let out some lewd moans and made a stain on her panties! Realizing that my daughter gets aroused from being spanked, I couldn't contain my excitement and ended up raping her, committing the taboo of incest!