Deep down you know what to do...
Be absolutely honest with your wife otherwise where would the trust be in your relationship?
THEN buy loads of guns & alternate between having them sent to a mates address, sent in boxes marked "boring work stuff", posted in ridiculously odd shaped boxes, THEN start lying about how much you paid/how many/"they're not mine I'm only looking after them.."
By this point in your career (no, not a new gun..) you are a lying, cheating..
airgun collector! IT IS BIG & IT IS CLEVER!
"Putting a country take on things..."