Yea, I don't want to sound crass, but applying just for her would lend a lot more credence to her claim of returning home to Cuba. I have heard it is quite difficult to get a TRV while you have a PRV is still in process. Don't let it discourage you though, you might as well give it a shot. I don't know if/when she intends to renew her contract, but that would certainly help too.
I have a good friend who is getting married here in Toronto in August, and I am part of the wedding party. So being the only person married among my friends it would be nice to bring out the wife (I'm 27 she's 26). Hopefully the fact that she is employed in the United States and EU helps. Basically I got her company in the USA to write a letter saying that if she needs to be back in NYC by Sept 1st to fulfill her contractual obligations. Who knows haha. But keep in touch and I'll let you know how our application is coming along. Best of Luck!