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Imo you're making it unnecessarily difficult and will still be at a disadvantage vs kb+m players .... My gf has this table from Amazon that she puts over her legs on the couch that might work for you with a 10key less KB and a high sensitivity mouse?
For a movie/tv lover you can always get her things she can use while watching shows. Ive been telling these gifts to everyone, but they are indeed really great gifts:
(1) Swell water bottle
(2) Mermaid blanket
(3) Popcorn maker
(4) Onesie/cozy pajamas
(5) A nice lap desk
Maybe a Lap Desk would help?
You can always use a wireless keyboard + mouse and put them on one of those trays people server breakfast in bed on and put it over your legs.
Something like this: http://smile.amazon.com/Winsome-Wood-Alden-Drawer-Foldable/dp/B0046EC19Y/ref=sr_1_4?s=home-garden&ie=UTF8&qid=1414275192&sr=1-4&keywords=breakfast+bed+tray