Very late answer to your very good question lol Well, his wife was still alive when they found her and she was the one who initially insisted that they had to keep her. Sam had his doubts because he worked/works for the military but she was so little and he was won over pretty quickly. He does love Lois and was pretty protective and enforced the whole "no one can know about this", which did leave long term effects on her even if his intentions were good. He still is suspicious of other metas, though probably not as vocal since Lois joined the superhero community, and definitely has the "MY daughter is different" attitude.