I don't see how that would work really, even if the buck was neutered you'd probably end up having to separate them whilst the litter was raised, which wouldn't really be fair on the buck and very confusing for him. Plus you'd have to separate them so the female could breed with another male, and there is a good chance they would fight if reintroduced after that, as she would smell different and had got used to another bun.
Personally I wouldn't rehome a bunny to that, as I would consider it a home where the bond could be at risk and the bun could end up being single for periods of time. I don't think it would be fair on the male bun.