Yes, I'm all about the pink headgear! Oh, and you just have to look up Pad-a-Cheek. You can get frou frou padding for the headgear pieces (especially where they lie on your face. I have hippy-fied mine with mismatched prints. It's a sight to behold. Anyway, your wife can pinkify to perfection.
I would recommend starting with something like the P10 mask, but if it leaks a lot, or if it's not comfortable, change it out. I waited too long trying to make it work; this made me miserable. She can always come back to it later.
I now use a Resmed full face mask (F10 for Her). The out valve kinda blasts in awkward directions (it's an older design), but it's the best fit for me.
Ooooh...forgot to mention, and your wife may or may not like this extra feature..... the humidification has made my hair curly all over. It was straight. Now I have ringlets. And I don't have to do any styling! People keep asking me, "How did you DO that?" I tell 'em: "I woke up one morning like that".
Another bonus, I have a fabulously unwrinkled triangular-shape in the middle of my face. It's as smooth as a baby's bottom. This is especially remarkable since I haven't been a baby (or even close) for many decades.
See here for hippy-fication (and yes, there are hose covers, too). I even kept the pinky-lavender on the rest of the headgear.