For someone who doesn't like pregnancy you wrote yourself into the pregnancy route too easily, if you don't like a fetish you shouldn't ever mention it in-game (specially how it was introduced).
Here's what you could do(if you don't want to re-write), just before talking with whoever will tell you if anthros and humans can interbreed, MC thinks if he even wants kids and you give three choices:
1>Whatever happens happens/It wouldn't be the worst thing.
(Early character pregnancy ending)(you can leave it grayed out, and write it at the end of development)
2>Maybe someday, but even if, later
(Continues the story normally, choice for pregnancy later)
3>No never
(Disables it entirely)
And the one MC talks to reaffirms it (1>Others that we know of before never had a problem 2>It's unlikely 3>It's biologically impossible).
About no pregnancy for the main characters, I'd rather have no pregnancy at all than having a character tacked on that no one will even care about, just for the fetish part. Remember you're selling a story, but most importantly(due the nature of the work) the feelings that come with the story.
Pregnancy is more than creampies and round bellies, it's the feeling that you're starting a family with someone you care about, if that won't be a main character then I don't know who could qualify.
<End of pitch>