For mothers day, I bought my wife a bunch of golf related items--she's relatively new to the game, but really enjoys it. She was getting tired of always wearing my hats, so I bought her a white underarmour visor. Also, got her a callaway glove, callaway pink golf balls, divot and ball marker combo, pink tees, and Adidas golf shoes (which she will most likely exchange for something else).
FTR, she already has a full set of Callaway clubs and bag (I bought her ~4 years ago), and she likes to match (like most wives, I think), hence all of the Callaway gear.