I like the asset-handler relationship as much as the next person, but I'm also a bit curious what you're looking for here that isn't, say, covered between http://archiveofourown.org/works/4230336 and http://archiveofourown.org/series/361304 ? Are you looking for more pro-active enthusiasm from the asset? More Steve reconciling himself to the permanence of the asset?
Re: The Asset is genuinely thrilled with his new handler