Although you and Miao girl haven't got a marriage certificate yet, you held a wedding, which is equivalent to opening your prospective husband-wife relationship with this Miao girl to relatives and friends.

The ex-girlfriend's problem is very strange in itself. Now that she is your ex-girlfriend, there is no need to care what Miss Miao says about you. You can answer or not, because you can't contact your ex-girlfriend anymore, and there is no need to contact. This should be clear.

If you feel you have to answer your ex-girlfriend's question, you can tell the truth. On key issues, telling the truth is never wrong, and ex-girlfriends should not take you for granted just because you tell the truth.