16.i have bent over backwards trying to prevent my other half sauntering around in the buff. what does this idiomatic phrase actually mean?

I believe these are the options:
1. I have been practicing lots of yoga trying to stop my back from getting too stiff. 
2. I have been stretching my mind to see if my cat could dance around in the garden.
3. I have tried everything I can to stop my partner from walking around naked.
4. I have tried to stop smoking in my house many times because it is very smelly.

The answer would be number 3. "Bent over backward" means to do one's best. "other half" would mean wife/husband. "sauntering" - wandering/walking. "buff" - Later, the similarity of skin to the color of the leather changed the phrase's meaning to "naked."