When Gibbs is helping McGee put on his cuff links before the ceremony McGee is already wearing his wedding band.
It's impossible for Delila to put her wheelchair so far away from herself where McGee goes to retrieve it.
After Gibbs is called by McGee about Delilah being in the hospital, the next scene shows a hospital with an Ambulance and Rescue Squad driving up. The Squad is clearly marked as Los Angeles County Fire Department.