wine - especially dessert wine (reisling)..wouldn't hurt to have a nice small cheesecake in there either.
various hard liquor (in case she doesn't like wine)- and learn some fancy mix drink recipes..I suggest the typical like buttery nipples, mudslide, fuzzy navel, sex on the beach, long island ice tea, martini.
Pictures of Family - especially if mom. Then nephews / nieces ect..even if she doesn't want kids, it will boast (sublimitally)towards your love of family, loyalty, nurturing abilities, patience (which you need a lot of with kids). Family minded men are usually a turn on for women. (based on what my wife tells me..lol)
Plants....non dusty, alive ones...no plastics. Regular and blooms. There are some pretty mean & masculine looking orchids out there.
http://www.orchidworks.com/orchids/bulbo.html (it subtly speaks toward your nurturing side and your sensitive / feminine side and your appreciation of nature and beauty. As much as we as guys deny having one we do...it's just to what degree. This says it without the "I love pretty flowers" flamer stigma)
Organized and clean laundry / closets - this is touchy...you want to be clean and organized without seeming "anal" / OCD . Women relate to closets & fashion, they can (and will) assume a lot about you by your organization and fashion sense, but all hate an uptight prick (no pun intended).
Various magazines - BB of course (obvious), National Geographic (you're cultured), Fortune 500 (business minded), Adventure / Motorcycle Magazine (adventurous / slight bad boy...which most like a little of), GQ (fashion sense)...I also buy the occasional Architectural / Artsy Mag for the coffee table. NO Hustler (womanizer), Martial Arts (violent tendencies), Guns & Ammo (obvious).
Then the obvious "guest" supplies...because you like to have "family visit" a lot...toothbrush (in package), deodorant (men & women so you don't look like you expect only women to visit), floss, brush, hair dryer (even if you don't use one). I used to have these on stock, I'd buy the "travel size" stuff at the local $0.99 store. CLEAN out your medicine cabinet and drawers!!!!