Marriage was about compromises; Ragnar had always been bad about compromising. He negotiated what he had too because it was practical and sometimes bending something would lead it’s eventual breaking. As far as Nerian went, Ragnar did not think there was anything to negotiate and had been rather pleased with how he had handled his slaves’ sexual advances and the bomb shell of her proposed love for him. He had been nothing short of absolutely faithful to his wife in the entire thing and he couldn’t blame Nerian for what she could not help. Ragnar did not consider it a big deal because he had turned her down, and if she continued to pursue him he would continue with his rejections (then again Ragnar is a man and failed to understand how it rubbed Thistle wrongly).