Beloved Companion

The chain won’t break, but Clint refuses to believe that, the same way he initially refused to believe they weren't on Earth, the way he refuses to believe any of Tony’s theories or admit that they’ll likely live out the rest of their lives here. Clint can't accept an unescapable scenario, a world where he can’t fight himself free, where the Hulk is not the strongest, where all Tony’s plans come to nothing.-or-She doesn’t like for them to speak, doesn’t like being reminded that they aren’t really pets, are actually thinking, autonomous beings and not her playthings.

I haven't marked this as non-con, but some parts could be viewed as skirting an uncomfortable line, so be forewarned. It was also intended to be one chapter, but was getting too large and unwieldy, so I broke it up. Some of the tags come into play in the second half.