Purely hypothetical but good question. I'd run into even more problems explaining where the big catgirl came from than those with human tuppers.

I hope that Cat would still want me and not just leave me for the next best person with better food but you know cats.

Ofc I would not lock her in and let her do what she wants, not that I could stop such beast with berserker strength. So yeah it would probably not end well. But it would be cool to have her walk around with me in public. Maybe one day household catgirl robots for her to control. [Spoiler]and mess up everything[/spoiler]