Might I suggest you weld some steel beams over the bed so if this does happen you will already be in a reinforced area and less likely to be pinned by beams.
You could even have them made up like a 4 poster bed and place decorative wood around the beams so your wife doesn't object to be sleeping in a building site or cage.
Then you could have some survival item stashed around the bed also protected just in case. start with water then some escape items.