Nonsense, an ex- priest has no authority to perform a Sacramental Marriage in the Catholic Faith. The Sacrament of marriage would be no more authentic than if the ex-priest Martin Luther himself performed the ceremony.  I am not talking about a  civil marriage. Next you will tell me that the so called  "women Priests" that claim to be Catholic priests have the authority to perform the Sacraments as well.  For a third time - Do you believe  the Fatima apparitions are authentic?  A simple yes or no answer would suffice.