Good Son/ rub her chest with your cock
You press you cock against her chest and rub your crown over her nipple. She starts to moan a little louder as you begin to slide your cock over her chest. You take her hand and guide her to put it on top of your penis. Now sandwiched between her chest and hand you start fucking her flat chest.
"What are you doing? This feels so weird!" the girl says. She grabs your penis a little tighter giving you a much better sensation. You grab her other tit with your hand and start massaging it. You can feel your orgasm building up. You can´t hold it anymore and your cum starts flying out, landing all over the girl´s face. As your cum hits her a loud moan escapes her lips.
Scared someone might have heard you, you quickly clean the cum off her face and get her dressed again.
"Oh! My mom is gonna be here soon! I still didn't choose an outfit! But I guess I don´t need one anyway!" the girl shows you her cute smile and puts all the clothes back from where she got them. A few minutes later her mother picks her up.
Over the next 30 to 40 minutes your mother shows of her body in a lot of different outfits. You are glad when you finally leave the store to go home in the afternoon. Not only because it was pretty boring waiting around while she was changing all the time. You got turned on by your mothers body. Especially her two piece bikini was erotic as fuck.
You gotta get rid of the tension. Your carry the newly bought clothes of your mom to her room. She thanks you and you quickly hurry to your room to jerk off. You realize you forgot your key in her room. Do you want to go back to your mothers room and get it or jerk off now and get the key later?