Unique situation last night on my DFW-SCL flight in J...we boarded a bit late and took our seats in 5A & B and I noticed that there was only one pillow/blanket pack for the two seats; I figured that the other was just in one of the overheads and didn't worry about it. When it came time to use it, though, it turned out that the lady in 6B had taken two additional packs and was using them already and that the FA seemed to be quite aware of it. Now, I normally wouldn't have a problem asking for them back (though who wants a used pillow and blanket?), but she was disabled and using the pillows for some sort of "support.". I really didn't know what to do. The FA brought me two packs of pillows and blankets from the Y cabin, but they really don't compare. I feel like the FAs should have been more proactive in recovering the products that each seat is supposed to include, and I think that the pax in 6B should have advised AA in advance if she needed something additional. But neither happened, and I meekly said nothing mainly because I was too tired to make a scene. What would you have done? On another note, we did get slippers, which was a first for me in the J cabin.