My suggestion would be training towards a sailing qualification - in the UK the Royal Yacht Assocation have various levels of qualification from Day Skipper throguh Ocean YachtMaster. Next best thing to being up in the air is being out on the water.
This would give your wife a skill that she could excel in (I assume you don't sail!), plus your adventures would take on a whole new dimension...
But of course your wife would have to be interested in this sort of thing for the present to be acceptable
p.s. You Lucky Bastard