shit, my missus earns more than me right now (although not MUCH more, we're both poor ass students) and I wouldn't change that for the world!
Get that hoe out on the streets earning some green!
jokes!
Seriously, if she likes the whole web thing, make her an e-commerce site.
This reminds me of one of my mates mom. His dads the real bread winner, but since him and his brothers grew up she was a bit bored and so thought she may as well be productive with her time, but still needed to stay in the home. So she started doing those "card crafts things (assembling intricate cards - not recommended shit money)
The she got into the e-commerce thing and now runs a pretty successful Ebay store. I think their last family holiday was 90% thanks to her online pass-time.