Peeking at her sister's bath and the ending

Katie Kush wakes up and finds herself alone in her friend's house with her friend's perverted brother, Rion. She stood up and started to undress to take a shower and noticed him peeping on her. Katie gets angry and confronts him, demanding that he get naked too so they can be equal. She didn't expect her friend's brother to be so HUGE and decided to take his dick out since they were alone.