I was actually planning to stash the 2nd car (1970 Datsun 2000 Roadster aka "FairLady") in the workshop and bring it out later telling her "I finally got done restoring the Healey" and she'd likely have not realized it was a Datsun instead of an Austin Healey, but decided (correctly) that she'd be so enamored of the little roadster that she'd forgive me the purchases.
What she doesn't know is that I've bought a bulldozer from a neighbor and told them to go ahead and keep it in their workshop for now but when they get a chance or need to move it for any other reason, go ahead and bring it down and park it to the side of the workshop, where she wouldn't see it.