It took a lot of sneaky planning but I finally convinced mom and dad to go out on a date for the first time in forever. Now my little sister and I have the house alone to ourselves...
I was heading out to go shopping when I realised I should text my little sister if she wanted to come along. She messaged "Nope, too busy". Curious, I repsponded "Busy doing what?" The video she replied with definitely answered my question.
My sister and I have a mutually beneficial relationship. When our parents are out, I'm allowed to fuck her in the ass, but only if she's allowed to finish on my face. Getting penetrated turns her on so I usually end up with a creamy mouthful of her load.
Your new step-mom seems to be taking over your life. It started out with teasing and inapporopriate touching - now when you're in public she drags you into the nearest bathroom and has her way with you. You hope it never ends.
Your big sister always takes ages in the shower each morning, making you late almost daily. Finally one day you decide to interrupt her and kick her out. Ever since then, you two shower together.