Your Dad and your Brother are out fixing something in the shed when your Mommy notices you are doing something underneath the blanket on your lap. Surely its too hot to have that on your lap Son, its sweating in here! Your Mommy knows exactly what you are doing.. touching and rubbing your cock hoping she won't notice. She does notice though.. and she doesn't mind.. she even offers to give you a helping hand to finish, although she keeps checking that you won't be disturbed. You can't believe it, she is even showing you her magnificent huge tits! You never knew your Mom could be so dirty, especially with her own Son...