A/N: This is for Hogwarts Assignment 1, Demonology task #5: Write about an affair. It's also for the Herbology hangout event. Warning for infidelity. It's 666 words.

Harry sat at his desk finishing up his last report of the day. His boss, Auror Roberts, had told him that he could go home once he had written up all of his paperwork.

As it was a Wednesday, he knew that it was his girlfriends day off and thought he would surprise her by taking her out for dinner and a few drinks.

When Harry let himself in Astoria's flat he frowned as sounds of moaning reached his ears.

Walking to the bedroom the moans got louder, and the sight that greeted him when he turned the corner was something he wish he could forget.

Draco Malfoy was pounding into her like his life depended on it, and his girlfriend was obviously enjoying it.

"What the bloody hell is going on!" Harry shouted.

Astoria's eyes widened as she looked at the door.

"What does it look like, Potter?" Malfoy grunted, not bothering to stop.

Harry couldn't look at the scene for a second longer and turned around to leave. He threw his key to her flat on the floor and walked out.

She was calling after him, but he didn't stop to hear what she had to say.

"Harry! Wait, please don't go!" Astoria pleaded as she tried to catch up with him.

He didn't look back and pretended he didn't hear her as he Apparated home.

As soon as Harry got through the door he headed straight for the Firewhiskey.

He couldn't believe after all the crap they'd been through that she could do that to him, and with Draco Malfoy of all people!

She was the one person he thought he could trust.

-0-0-0-

A few days later there was a knock on his door and when he opened it the last person he wanted to see was there.

"Can we talk?" Astoria asked nervously.

"I suppose we better," he said opening the door wider.

They walked through to the kitchen in silence. As far as Harry was concerned there wasn't much to talk about.

"What is it you want to say?"

"I'm sorry. I know it shouldn't have happened," she said remorsefully.

Damn right it shouldn't, he thought.

"Was that the first time you shagged him?" he asked.

A guilty look crossed her face and Harry knew what the answer was.

"How long has it been going on?"

"Do I really have to-"

"Yes, Astoria, you do," he interrupted.

Harry could see her wince at his firm tone, but he wasn't about to let her get away with not answering him. He had a right to know how long it had been going on for, and if there were any other men she had cheated on him with.

"Six months," she whispered.

"Was that the first affair you've had?" Harry asked.

"Yes."

"Do you love him?"

"No, I love you," she told him tearfully.

"If you really loved me, Astoria, you would never have had an affair. Least of all with him," Harry replied.

"We can work this out. I promise it will never happen again."

Harry wished he could believe her, but he couldn't. There was no way he could ever trust her again even if he wanted to.

"I'm sorry, Astoria. I can't do it. You've hurt me, and as much as I love you there is no way to repair it."

"Please, Harry. I'm begging you, please give me another chance," she pleaded as her tears began to fall.

"I'm sorry, Astoria, but it doesn't matter how much I love you, I will never be able to trust you again. After facing opposition from our friends, hate mail, and a psychotic stalker, I really thought we were getting somewhere. Obviously I was wrong," Harry told her.

His words only made Astoria cry harder. He had always hated seeing her cry, and it was hard for Harry to know that this time he was the cause of it. It had to be done though; she had to know how he felt.