Any Foster Parents Without Bio Kids?

I was adopted by a single woman who never married and never had biological children. My wife and I also decided to adopt from foster care rather than have biological children. We have three siblings, girls 9 and 10, boy 7, who we hope to finalize with soon. I've never gotten any comments like those you describe, but I do sense a lot of suspicion that we're hiding infertility. And that's fine -- there's nothing at all shameful about infertility, so I don't particularly care what some people may think.To me, it's a really sensible way to create a family: We want a family, the kids want a family, so we create a family together. From personal experience as both an adopted child and now a (soon to be) adoptive parent, I'm quite confident that love is unconstrained by a lack of shared DNA.Good luck!