Tony, I would highly recommend Chatham. Try the Surfside Motor Inn in Chatham....it is at the end of Main St in Chahtam, 100 yds from the water, 10 minute walk back to town for shopping. Not cheap, but nothing is in Chatham....that time of year, probably $90-95 per night. Not fancy, but clean....has an "old inn type atmosphere".
It's a 10 min. walk to the Lighthouse area.
Better than that.....if your wife likes a beautiful beach....get in the car, go about a mile beyond the lighthouse on Morris Island Rd. to the Rip Ryder water taxi shuttle to South Beach...about 4 to 5 miles of unspoiled, population free shoreline, with tons of seals for your wife to watch. It a long penisula...surf fishing on one side, at least 3 miles of flats fishing on the other....only a 5 minute walk anywhere from surf to flats. Round trip is $10 each....runs 8 to 4....pick ups in between per Captain Keith's shuttle.........in my opinion....it is heaven!!!! Look up Rip Ryder in the sponsor section of this site.