Definitely Tensing Pen! Cove cottage now has AC and is situated right above the cove with a stellar view and the Rock cottages are also great. I would prefer any of those to a pillar as they are very tiny but do have an outdoor shower. RC2 has air and they may have put it in RC1 by now as they are planning to put AC in all the cottages eventually.
There are outdoor showers to rinse off the salt water at all the sea entrances too.
The property is magical and would be an amazing surprise for your new wife!