I had an idea last night on my drive home from work, and I think you should try it.
When she calls to make sure that you are going to be there to pick her up from the airport, tell her you can't make it. Tell her to take a cab and offer to pay for it for the inconvenience. When she gets home, you should be there on HER couch...naked with only her cat in your lap (I hope it's de-clawed). Let the evening go where it may from there....
'When I'm not longer rapping, I want to open up an ice cream parlor and call myself Scoop Dogg.'
-Snoop on his retirement
Your Mom is happy.