Is it "OK" to cheat? No.
But... it IS smart to plan to phase off, enjoy your wedding and honeymoon, and then come back to phase 1 when you get back. It might have been a little close to your wedding day to start a reboot, but if you give yourself a week of P2 and a week of P3 going into your wedding, at least your body will be able to readjust before you throw wedding food at it
If you're rebooting, you already know that there will probably be consequences on the scale....but you also know what you need to do about it when all is said and done.
Congrats on your wedding!