I’ve had a similar situation recently. This is how I tackled it – Planning & logistics! I bought a frame off here 7 months ago with the idea of building it up slowly by the end of this year. Well, I was getting fed up waiting and it’s now recently built ahead of schedule. All I had to do was hide it from the missus until the build started.
So it slept in a dark corner of the loft until a few weeks ago, then when she was out, smuggled it to the lbs along with amassed bits. Bike is kept in the shed / car and my plan is to slowly introduce it over the next few weeks…..might go down the line of “yeah, decided to paint the frame, was getting fed up with blue”.
So far, I’m successful in my deceit. I know, it sounds terrible, but she is addicted to that Groupon crap and I don’t give her any flak for. And I know she tries to hide vouchers from me….badly 🙄
Either fess up, take some abuse with the potential of losing her forever….or hide it from her. 😉