My wife and I have an unspoken rule about IKEA — we go there separately and we don't comment on what the other bought.
My wife does sometimes bait me by asking me if she has spent too much (at IKEA) but I'm too clever to go down that road.
I just wait for the bills at the end of the month for an idea to see if too much money has actually been spent.
BTW people, it is pronounced 'ii-kay-ya', not 'ai-ki-ya' or 'oi-ki-ya'. You know who you are.