jimmy- us citizien /simi- canadian citizen, may 10th jimmy…

jimmy- us citizien /simi- canadian citizen, may 10th jimmy married simi in toronto canada however did not register the marriage with ontario,thought process was simi come to usa via TN Visa as she is a nurse and marry him officially after 90 days of employment via us employer sponsor, we thought this way we could avoid spouse visa and processing time of 14 months, may 12th jimmy and simi traveled to florida, usa, june 21st simi went back to canada to get more stuff from home, june 29th she was planning to come back to florida stopped at us/canada border at buffalo, ny because after three hours of questioning customs realized that she was in a relationship with me and had no papers, return flight documentation, employment papers, etc, she had immigrant intent, they asked for jimmys information, phone #, address etc, found checks in both of our names in purse, pictures on phone etc july 1st jimmy is traveling to toronto, canada to marry simi officially in court july 2nd jimmy is getting marriage certificate and license in toronto to simi and starting process for spouse visa, july 3rd, jimmy is coming back to florida, usa Question: what does jimmy tell customs when they ask why are you going to canada? is it ok to tell them i am going there to register my wedding and i am returning as soon as that is done on the july 3rd since they might've indicated in their records that simi and jimmy are married when simi was interrogated and however did not register it?, please advise jimmy xxxxxxxx **********