I Finger Fucked my 16yo Stepdaughter
She's always sat on my knee, ever since she was a little girl. As she grew older she still did it and she used to kiss me on the cheek.
When she was developing little boobs she started looking at me differently and I started to steal her panties and beat off with them. She never knew that but she did realise that sitting on my knee made me hard. My cock pricked her a few times and she knew it.
Eventually, when she was 16 and was sitting on my knee, making me hard, she stood up and grabbed my hand and pulled it onto her pussy. It was unexpected and I didn't know what to do but I couldn't resist and started to rub her through her pants. I took my other hand, pulled her panties to the side and stuck my middle finger in her pussy. It was beautiful. I fucked her little twat until she panicked and stopped and ran off upstairs. I sniffed and licked my middle finger and wanked until I shot a load.