Foggy-crestfallen
It was foggy and Remus Lupin pulled his shabbycoat closer around himself. He gripped his wand tightly, ready to pull it anytime, if it were necessary. The dementors were everywhere now, even breeding in the small muggle town where he lived with Tonks. Had lived, he corrected himself. There was that tiny voice in his head that tried to tell him to stay.
„You can't leave her, Remus, she's pregnant!" Damn it, that voice sounded too much like Tonks.
„But what if the child is... like me?" he tried to argue with himself.
„Running away won't change that."
„Maybe she'll have an abortion."
„You know that she'd never do that, even if you run away." Remus shook his head, trying to get the thoughts out of his head. Arguing with himself never ended well. Where was he going to go now? He couldn't go to anyone from the Order. If they found out that he had left Tonks- No, better not finish that thought. Harry. He was going to find Harry, Ron and Hermione. He was a skilled wizard and they could do with his knowledge. And surely they'd understand that he couldn't stay with Tonks. He was only putting her into unnecessary danger.
As if to underline his miserable mood, it started to rain. Remus increased his pace. He had left her a letter explaining everything, hoping that she'd understand. But he knew she wouldn't. That was Tonks, so naïve, always finding a way out of everything. Except this. Suddenly he was thankful for the rain, as it made his tears less obvious.
It's not like this is a permanent thing, he told himself. But he knew that it was. Tonks wouldn't want him back, once she found out that he had left her. She'd hate him forever. He could still go back. Burn the letter and slip back into their shared bed. She'd never know. But she would. She knew him to well, she would see it in the way he would look at her, the way ke would kiss her, the way he would hold their child, once it was born.
Remus didn't want to think that far. Tonks was only a few weeks along, the child wouldn't be born for months. A lot could go wrong in that time. Maybe she miscarried. That was not that unlikely, especially if it really were a werewolf baby. He should be there for her, if she did, though... Remus thoughts kept going in circles. He started running, running away from Tonks, the baby, the problems, the future. Then he disapparated.