The Portal (Novella) by S E Gilchrist

When Janni, a young salvager, boards a space wreck, she is caught for daring to steal Darkon tech by a patroller and the one man she had thought never to see again. Several months ago she had allowed him to slip past her defences for a brief and wonderful interlude. But with both of them on either sides of the law, they had walked away. Now they are trapped on a wreck and with an alien life-force hunting them. Will the patroller save her or abandon Janni to her fate?