Far from teasing her, Ivar goes very still as she makes her offer. His mind goes immediately to one thought at first and he looks petrified. For one, he hasn't even thought of having sex with Letha. She's a married woman and that's cheating even in Viking society. Secondly, there was the matter of his...problems. She couldn't know about it, but he did, and it made him terrified at the idea of sharing a bed with a woman.

Once she explains herself, he looks less like a deer in headlights and breathes a sigh of relief. So, just watching over her. He could do that. He's done as much before during his time back home for his brothers when they were up at the cabin they'd built. He's very succinct when he speaks, not trusting his voice not to have an edge of panic when he speaks. "I'll do it." He hasn't been that close to a woman since the last time he'd slept (platonically) with Margrethe. Still, he could do it. He could. Ivar just had to convince himself.