You should show her your cock and see if she likes it, if she does then fuck her.
I did the same with my hot older sister before we started having sex and enjoying each other. She'd be at the counter, making a sandwich or something, and I'd go behind her like I was on the way to the table, and my hand would braise or lightly grab her ass. A few times, I'd stand behind her and reach up for the cabinet she was right under, and hold her waist or tits for balance. That one was easy for her to pick up on. She'd laugh it off even when my hand would go inside of her robe. I'd help her wash her car and my wet hands were constantly on her body, joking with her to tie her shirt up and do a wet- t-shirt for me. I had as much fun with her body before we started having sex as I did when we finally did start and go at it every day.
