Today my lover's parents weren't home so she invited me to her house. I got to see her sister Karen again. Karen is extremely beautiful and cute, especially with her beautiful long legs. She accidentally exposed her underwear in front of me. I couldn't take my eyes off her and she caught me. I thought she would be angry with me but no, she also wanted to replace her sister and have sex with me. And she was even bolder when she wanted to have sex right next to my girlfriend!!!