Helping mom shop for panties

My step-mom just got back from the mall, with a couple of brand new thongs in different colors. She decides to try them all on! She tries on a brown thong first, and then she decides to call me in to her room. "Mom! Those are see-through! Put some pants on!" I tell her. "Come on! I need your help!" she tells me. She tries on a pink thong next and she asks me if her butt looks good in them. "They give you a nice shape," I tell her. She tries on a black thong next and I can feel my cock getting hard in my pants. "Do you mind if mommy puts it in her mouth really quick to help you take care of it?" she asks me. She quickly puts my cock in her mouth and it startles me at first! She keeps giving me a blowjob for a few minutes until I cum in her mouth. She swallows it all and she tells me that I came a ton in her mouth! My mom is sitting on the couch drinking a glass of her favorite red wine. "What was I thinking, blowing my son?!" she asks herself. My mom's eyes begin to close and she dozes off to take a nap. I walk in to the room and I ask my mom for some money, but she barely responds to me. I decide to take my cock out and I put her hand around it. I make her hand jerk my cock off up and down. I get in between my mom's legs and I shove my cock in her pussy. She starts to wake up and she is confused, but I tell her that I know she wanted it! She allows me to keep going, but she tells me that we can't do this all the time. I start to grab at her big, natural tits while I fuck her. "We shouldn't do this too often, sweetheart" she tells me. I end up cumming deep inside of her pussy, but she tells me that we need to have a talk about that later... I am sitting on the couch, looking at some porn on my cell phone. My mom walks in the room and she is on the phone with what sounds like my dad. She walks up to me and she starts to give me a blowjob while she is having phone sex. She pulls her shirt down so her big tits are exposed. Then she hops on top of me and she starts to ride my cock while she is still on the phone. "I'm going to cum!" she moans as she rides my cock up and down. I smack her clit with my fingers but my mom tells me to stop, since she is still on the phone. My mom lies down on the floor and I fuck her in the missionary position while she continues to have phone sex. My mom bends over in to the doggy style position and I shove my cock back inside of her pussy. She hangs up the phone and she tells me, "If your father only knew how good his son fucks me!" I cum inside of my mom and then she realizes that she never actually hung up the phone... Uh oh... We might be in big trouble! My mom calls me in to her bedroom the following day, while she is drinking some wine in bed. My mom confesses to me that my dad thought it was really hot that I was fucking my mom while he was out of town! "Your dad wants me to take a photo of me with your cum all over me and send it to him! Your dad is a cuck and he wants to see his son fuck his wife!" she tells me. My mom puts my cock in her mouth and she starts to snap a few photos of it. My mom lies down on her back and I start to fuck her in the missionary position. She snaps a few more photo's that she can send to my dad. "I want you to cum all over mommy's bush when you are ready!" she tells me. I ask her if I can fuck her from behind first, and she bends over for me. My mom gets back in to the missionary position and I cum all over her bush and her stomach. "Good boy! Now let's take a picture for daddy..." she tells me.