ロコロからの熱い女の子は私の義理の妹であることが判明しました

I met a girl on the dating site Rokolo. We had a nice chat and she even sent me a photo of her breasts. Everything was fine until I found out that my naughty stepsister at that time was also communicating with a guy on the dating site Rokolo. I receive a new message and find out that...