I occasionally meet for lunch with a former colleague.
She's nice company on the whole, although she's much older than me and has extremely old-fashioned views.
DP and I are not yet married and have a DD. For some reason it really bugs her that we're not married, and every time we meet she interrogates me about exactly when we're planning to do the "honourable thing".
We're engaged, and currently expecting DC 2, but I have no intention of rushing down the aisle complete with huge bump. We're quite content with the idea of doing it in our own time.
I understand that some people do feel strongly about marriage, and in an ideal world I'd have preferred to have been married before we had children - but it didn't work out that way. And given that DP's mother is a staunch Catholic and even SHE has the decency not to bang on about it, I don't see why an ex-colleague feels entitled to pile on the pressure.
Oh, and she also said (long before I had children) about another unmarried couple who were expecting their first: "They'll start calling them little bastards again, you mark my words!"