Chessa would definitely have bruises on her hips from the way he was squeezing at her. She'd also likely have a little difficulty sitting comfortably for quite a few days. It didn't matter though. The sensations he was causing in her were delicious and worth every bruise and ache he caused.
No, Chessa didn't fight. There was no use in fighting. Thanatos was her master and it was better to please him than to fight him. Moaning, she panted as everything began to feel really good. He was rubbing against something inside of her that felt incredible. It wouldn't bring her to climax alone, but if he grazed her clit she was sure she would explode.