She wanted to teach him how to please her.  She had him take off her panties so she could show him her pussy.  It was his first time.  Slowly and gently she urged him to get close until his lips touched hers.  "Now, darling, stick out your tongue"  He did and she maneuvered her self so that his tongue was touching her clitty.  This is one of your reward for being such a good sissy for your mommy. She still wanted more so she laid him down and then sat on his face.  He was surrounded by her dripping swollen pussy.  This made him harder.  Mommy saw his erection grow and wanted it in her mouth