Since you wife lands first, she may as well grab her bags and exit the baggage hall. As she exits the double sliding doors there will be a cafe directly ahead. (She'll have to exit left or right after the last door but the cafe is quite visible straight ahead.)

The cafe can be a bit crowded at times so alternatively if you exit right and walk just past the dinosaur there are usually some free seats there. Also in that direction are washrooms, a drinking fountain and a small convenience store.

A third alternative is to take the (free) train to Terminal 3 which is connected to a Sheraton where you'll find a more comfortable bar and I believe a full-service restaurant as well. The train is upstairs in the Arrivals level.