There is a risk involved in doing that, yes. The risk is by entering the country on a visitor's visa when you intend to file for a green card, you are breaking the law. This has been discussed at length elsewhere on this site, including several flame wars, but have no doubt, if you try to re-enter on a tourist visa you face the possibility of being banned.
The reason is due to having immigration intent. On certain visas you are allowed to enter the country, even if you intend to immigrate here. An O-1 is one of those visas, another is an H-1B. However if a CBP officer figures out you have immigration intent when entering on a tourist visa, they will deny you, plain and simple.
Even if you can bluff your way past the CBP officer (which can be done, but it is dishonest and illegal), then when you file AOS you will be quizzed by the USCIS officer as to why you entered on a tourist visa. If you cannot prove to that officer that when you entered the country you did not intend to file for a green card (will be difficult as you are already married), then they will deny you AOS application.
Your best bet is to file for Green Card now, and file for AP and hope it gets processed before Xmas. This way, everything is done legally and relatively risk free.
