Hide the new ones you get. Or won't she 'buy' a 2 1/2 - 3 foot tall coffe table?
(engine, no honey I bought you this nice counterweighted coffe table, see it won't tip over that way)
To answer your question, no, I don't think 6 is enough. But then, we have approxiamtely 14 (counting the ones in vehicles currently) between dad and I.