Much prefer the Mrs. uses the anavar over the winstrol for a first cycle.
NO you cannot mix the two on alternating days. And NO don't stack the two if she's never cycled either of them. The other thing is make sure the DIET is tight if you want to cut. Don't lean on the drugs to do it for you. Winstrol will work better for cutting, but primarily because it inhibits estrogen - which we all know can make you 'leaner' since you're carrying less water (i.e. no bloat), but on the other hand, its a bitch on your joints because they are getting dried out too. Further winstrol is more androgenic than anavar. Expect the chance for sides like hair falling out, acne & voice change.
Here's some info you should read (I wrote this so I know its good info & is the same that I would tell you if I rewrote it here).
The World of Women's Drugs: Anabolic Androgenic Steroids (AAS)-Part 3 of 3 - RX Muscle Mag