Yes... She did promise

As uncomfortable as it made her feel now knowing exactly what Harry wanted to do with her. Putting his dick up her butt! Really? Well okay then. She thought, I don't know if that makes sense but if that is what you need of me I guess I'll have to try it.

It was clear to Harry how she struggled and hesitates but something made him feel pretty sure she would go along with it. After the longest couple of seconds in both their lives. She finally nods "Mmmh okay Harry... I'll try it." Before she ends she speaks up "But! But I'm not sure I can actually do it Harry. I've never had anything up my bum before. So I don't know if it'll work." Now she whispers "You know actually fitting your dick up my bum." She blushing hard at the end saying it out loud made it sound so naughty.

Harry was overjoyed and nearly jumped out of his chair. But managed to reign himself in when she said; but! He listened very carefully his expression changing all the while.

He nodded by the end with a big smile on his face. Of course Hermione was worried about taking a dick up her ass. He would be too. Still she was so awesome that she promised to give it a try regardless how scared she was.

"I know Mione, I know. It's real scary but thank you. Thank you so much for this. Don't worry too much if it doesn't work this time..." He added this time to imply they would do this again. "... There are other ways for you to help me. It's just that this is what I really, really want to do."

She feels so embarrassed having her best friend confess this. She appreciates his honesty, kindness and trust in her. A big broad smile form on her face and she says "I see! I promise I'll do my best for you. Really! I want to be able to do this for you. I can tell how much you want this Harry." She can't help but to grin a little teasingly back at him. Calling him out for being kind of a perv for wanting to do her in the bum.

It's Harry's turn to feel embarrassed "Yeah I don't just want this Mione, I need this. There is just one problem." Hermione looks alarmed, what does he mean? He continues "Like where are we supposed to do it? We can't very well do it here? People would notice and... Eh, I doubt you'd be able to keep it down." He adds half embarresed bringing to light the idea that this won´t be all that easy for her.

She nods approvingly yet with a hint of worry, that was indeed a big issue and yeah it´s quite realistic she will make noise, how embarresing. Hanging out alone was no problem, but this time, no could find them. Ron are very likely to come looking for them at some point. How embarrassing if he would find them with Harry's cock up her bum. No, they would have to find a place where they won't be disturbed and but where?