As all ways all sexual participants are over 18.
*****
Robert felt the last spurt leave the end of his still hard cock as he held on to the shower pipe. He looked across the top of the privacy fence like he could actually see his mother there masturbating like she did earlier in the summer. That started a change in Robert, he finally started seeing his mother as a sexual being not just Mom. His friends had joked about her athletic and muscled build and her being a MILF but not too often because he had punched Jimmy Merritt in the face when he came out said he wanted to fuck Melani. Now Robert saw it to and still wasn't sure what to make of it.
Not that he didn't like older women. Hell he was 18 and continuously horny especially now that his girlfriend had decided to go out of state to college. He liked pretty much all women and anyone who would allow him to mess around if he hadn't promised Alyssa. He and Alyssa had did something sexual almost daily since they started dating last winter. Now he was stuck masturbating to images of Angela Everetts Tits and his Mom's tight ass since he had promised Alyssa to stay true to her.
A surge of panic gripped Robert as he thought he saw the curtains in the guest room move from the corner of his eye. He jerked the towel in front of him and eyed the window as his heart pounded from the fear of being caught rather than the orgasm he had just had. Robert watched the curtain as he wrapped the towel around himself. His cock now deflated like a balloon let loose to fly across the room. Finally a sense of ease came across him as he realized he was just imagining it. Stopping by the pool house he grabbed another towel for Blake and walked across the yard.
He tried the mudroom door thinking Blake would have locked it but he didn't. Pushing open the door he saw the other boy bent over the shower with his ass up in the air as he was attempting to wash the rest of the mud down the drain. Robert noticed Blake didn't have any tan lines and the roundness of the naked ass had his cock starting to swell a bit. Robert wasn't gay but it seems like anything would get him hard these days. Hell he couldn't say if offered that he would bury his cock in the other boy's asshole. Especially since he could see it wink and flex between the cheeks as Blake moved around the tub.
In order to cover his embarrassment Robert rolled the towel up and the proceeded to pop Blake on the cheek of his ass leaving a read mark as the boy stood up and howled. He turned quickly allowing his cock and balls to flap as he did. Robert had seen them before, in the locker room at school and just a few minutes ago in the front yard when Blake got his pants pulled down. So he didn't stare, instead he threw the towel at him and chided him for not locking the door. After all what if Melani had walked in!
Blake motioned to the door into the housed before saying "I locked it, didn't want your Mom catch me naked in the shower."
Blake had lied of course, oh he did lock the door, but he would have loved for Melani Souza to find him naked in the shower and join him. She had been a masturbation fantasy of his ever sense he started to do it. Between her and his Mom and sometimes the thought of both of them together would get him shooting ropes of cum all over the place. The contrast of the two women was just sexy. Melani was tall lithe and medium curves while his mother was shorter but had fuller curves. Blake knew Robert had the same thoughts about Angela that he did. He has saw how his neighbor and classmate would watch his mother out of the corner of his eyes or more blatantly when he thought no one was looking. Blake sometimes felt a little guilty about masturbating thinking about his mother but never had guilt when thinking about fucking Melani.
Robert asked "Want me to go grab you some shorts to borrow."
Blake had just knotted the towel around his waist when he replied "Naw, it's only two house over, plus I might give Mrs. Pennington a thrill."