A woman comes to bais din with two aidim,says that her husband is dead,she marries again.first husband turns up not dead.does she return to first husband? Are children with second husband mamzerim?
The children are mamzerim, because she had them while still married.
However, because she was married by the word of two witnesses, she is permitted to return to her first husband.
This is different from a case of a woman who gets married by the word of a single witness, who becomes forbidden to both her second and first husband.