I'm posting this one for a friend. She wasn't sure if she should post here because she's not 100% sure it's an SSHG, but I think there's a good chance it is. I apologise to the group if it turns out I'm wrong though! Here's her description:
I have been looking for a specific fic for several years & hope somebody here may be able to help. I cannot remember the title or even the author.
I began reading it about 7 yrs ago, when it was only a few chapters long. It was incredibly well written, and I decided to put it on hold until it was finished, & I could enjoy the whole thing in one go. (I can read an average sized novel in just a few hours)
It was set mid-Hogwarts era, & Snape was still a spy. He became aware of planned attacks against muggle-born students during the holidays. He knew of a planned rape & attack on Hermione, and wanted to protect her, but not expose himself as a spy.
He decided that the attack would need to go ahead, and polyjuiced himself into Hermione to take her place, figuring that himself being raped one more time would make no difference.
He hid Hermione, and took her place in her bed, and was duly attacked and raped. It was more painful & unpleasant than he expected, because Hermione was a virgin, and he experienced quite severe abdominal pain & inuries.
The last scene I read was Snape & Hermione talking on a park bench somewhere, as he explained what had happened & that she would need to protect herself from now on. He was still in pain, even though he had reverted back to his own body, and he'd begun to wonder if it was possible for him to have conceived a child during the attack when he was female.
I have never been able to find this fic again, and would be VERY grateful if anybody has any information on it, or one that sounds similar.