Help me to use the loo?

Mrs. Weasley's face turned red at the sudden request. And then you added,

" It's kind of urgent."

Mrs. Weasley then held out her hand for support and you moved out of your bed. While doing so you brushed against Mrs. Weasleys soft Melons but she didn't react to it thus satisfying you.

You walk up to the restroom with Mrs. Weasley behind your back. You reach the toilet and start to give a quizzical look at her. Her face turns red like her hair.

"Um. Harry, this is going to be difficult for you isn't it? I'll help you out. But a word of Favor, don't mention about this to anybody.."

"This might get messy", said Mrs. Weasley as she pulled off her robe.

You nod your head and face towards the toilet. The plan is a success. Mrs. Weasley walks up behind you and pulled down your pant and undies. Your cock sprung high which make her gasp inaudibly. She then held your penis and pointed at it. You peed in and Mrs. Weasley started shaking it to remove the last drop. Then you hear her breathing getting heavier. Your cock starts to throb.

Then her hands moved up and down in continuous swift motion.

"You are not telling this to anybody, right?"

You nod your head again and she starts rubbing faster and faster. She starts fondling your balls with one hand and wanks your cock on the other. You moan out when Mrs. Weasley sucked in your earlobe while fondling. You reach your limit and you turn around and shoot at her...