Not exactly true.
While I appreciate this may not be your issue, what the door press does is manually trigger a computer wakeup, which then
rescans the immediate area for a fob within range. Then it will initiate the unlocking manually if found; you see why I hoped this would benefit your situation as this has been an issue in the past.
If your fob is detected differently than another (your wife's) I would suspect possibly a battery/signal strength issue.
(Yes, the similar names must have people thinking this is one guy thinking out loud...)