i bought my first bass rig, a 400watt head and 2 cabs without the misses knowing, i felt guilty, so i snuck it in through the man cave back door and hid it in the corner with a sheet over it, it took 5 weeks for her to notice what it was but by then i said, i have had that for a long time and it was forgotton, no issues, i also regulary by bits and pieces that might cost a bit more then she might approve, i hide those in the music room cupboard. 