Yes

You stood there stunned you had your sister's underwear in your mouth and your hard cock in your hand. You could not respond to your mother.

When you did not say anything your mother opened the door to check on you and that is how she saw you.

"John do you think you have time for that. Why didn't you take care of that last night and what is that your eating. Don't tell me their your sister underwear I don't know who is worse you or your bloody father. Some nights he gets me to put on your sister's school uniform when he fucks me."

From the moment she entered the bathroom you had stopped wanking but you still held your cock.

"At this rate your never going to finish. Here let me help you."

You still had not said a word and all you could was watch as your mother dropped to her knees and took your hand from your cock.

She took hold of the base and you looked down and saw her tongue snake out and lick the head of your cock.