Her modern sensibilities were kicking in. She had just had unprotected sex with a man, and he had cum inside her. What if he had knocked her up? For a moment, she tried to banish the thought, assuming the temple would make sure an ahuianime who was at her most fertile wouldn't be the one used for a sacrifice to fuck. Or maybe they specifically picked her because she was ovulating? She wasn't sure, and she felt she had to have an answer, so she wished to see what was going on inside her body.
Her heart almost stopped dead as she saw an ovum. It was waiting longingly, nestled in her ovary, instinctually aching to get fertilized so it could start the process of reproduction. It couldn't tell yet, but the process was already set into motion.
What was to start it was racing towards the egg- even though the man they had come from had been killed, his seed was alive and desperately racing through the body they had been released into in search of an egg to fertilize.
Despite herself, Ty felt a pang of arousal and satisfaction as she saw the seed surround her egg from all sides and set about weaning away at its outer walls. Ty's new self recognized that this was a part of existence in this tribe- she and the sacrificial victim were making their own sacrifices. He had given his life for the sun to rise the next day, and she had given her womb for his offspring to rise the next day.
Sure enough, she saw her egg capitulate to his seed as one moved inside and fertilized it, and it moved into her womb to gestate. Ty had officially gotten pregnant.
She wondered what she should do about it...