You want to speak with your stepdaughter Summer about her thumb sucking. At 18, she is a little old to be doing this and you are concerned that she will get buck teeth from doing it for so many years. Summer tells you that it comforts her. You tell her that you can give her something better to suck on and she wants to see it. When you take out your dick, she is quite surprised, although she does want to break her bad habit. She knows that you want only the very best for her, so she asks what she should do next. You start to stroke it right in front of her and she smiles. "You have a nice cock, step-daddy," she says. How do you want her to suck it? She sucks her thumb to demonstrate and you get harder. Summer removes her shirt and bra as she reminds you to continue to stroke (like you'd forget?!). She thinks that it might be nice to feel her lips around your dick, but she starts instead by sucking her thumb while she plays with your dick.