PPPE-062 My lover's younger sister has feelings for me

My lover and I have known each other for a while, so I often go to live at her house. My lover has a younger sister, Karen. Even though we often quarrel, we are really close. Today my girlfriend said she was going on a trip with her female colleague at the company. I didn't pay attention until I accidentally discovered that she was getting into another man's car! When he returned home angrily, he met Karen sitting in front of the door. It turns out she had realized this a long time ago but wasn't sure. At this moment, Karen confessed her feelings to me. I didn't believe it so I joked and asked her to take off her panties and spread her pussy in front of me. Unexpectedly, Karen did it without thinking. Angry about my girlfriend's situation, I vented all my anger on Karen. If you were unfaithful then neither would I. I treated Karen extremely harshly, blindfolded, handcuffed, strangled... But Karen accepted everything, without a word of blame. That calmed my anger, made me calm down and realized I had done something wrong to her. From that moment on, I gradually felt Karen's love for me, and I wanted to reciprocate her love. When my girlfriend returns, I will definitely break up with her and go on a date with Karen.