Does that make her children from the second marriage mamzeirim after Techias HaMeisim since her original marriage is still valid?
Just to clarify my question — a comparable case would be one where an aguna remarries on the basis of the testimony of two eyewitnesses and yet, they were mistaken and her husband shows up. She was allowed to remarry, and yet, because her original marriage was still intact, her subsequent children are mamzeirim.
The Wolf