Nice answer, really, but what they will look at and care about is less predictable than you might think. It's all circumstantial. But, unless there's more too it, they don't care if you met before a divorce was final, if that's the whole story. A common fraud scenario is when one or both divorce and marry so the first can immigrate, then divorce the petitioner, remarry their ex, and bring them. This is not something that is assumed or even suspected, just because you met while one of you was still married. There would have to be other factors pointing to such a concern.