Two cousins rock each others world

This is not a true story, just a fantasy of mine with my real cousin. I changed the names so in case they find it, it’s not too obvious. This is my first story so sorry if it’s not great and let me know if there are any mistakes and I will correct them.

Jessie walked in on Bill in the shower. She caught a glimpse of his naked body. She had never thought of him in a sexual way before. Why would she, he was her little cousin. She had always looked at him as a child since she is 7 years older than him. Until now, when she saw his wet naked body. As she looked at his surprisingly muscular and toned body, she felt herself get turned on. She was attracted to her younger cousin. She felt ashamed but also thrilled. She noticed his young virgin cock. In a flaccid state, it was nothing impressive or shocking. Quite frankly average and plain, but she did wonder what it is like hard. As she continued to peek through the cracked door she hoped he didn’t see her. But a hornier side of her wanted to jump in there with him. She knew no one was home since the reason she was there is to make sure he stayed out of trouble when his parents were out of town. So she reached down her pants. She felt her panties were soaked from looking at her teenage cousin.