There is no Biblical basis for annulment.
God did not recognize it and Jesus never taught it.
It’s strictly a man-made concept to avoid the stigma of a divorce.
You get married and have sex, you’re married, period, and the breaking of the marriage is called divorce.
There is no Biblical basis for marriages against ones consent. There is no Biblical basis for marriages involving children. There is no Biblical basis for marriages involving the retarded. There is no Biblical basis for marriages between siblings and otherwise incestuous relationships. There is no Biblical basis for marriages that involve polygamy or bigamy. There is no Biblical basis for marriages involving fraud or deception. Yet all of these are causes for a declaration by the Church that the marriages were never valid.
May your everyday be like Easter Morning and your every night like Christmas Eve.
I understand the concept (and I’ve never been involved in one); I think it makes sense.