COMFORT is all. My xh really liked me to wear sexy nightwear - and I did wear it but I have to say that one-size-too-big fleecy pjs have it for me. I could write the definitive chapter on the joy of big knickers [as opposed to thongs which I firmly believe are the invention of men, not women. If I were going to burn underwear it wouldn't be my bra, but a pile of thongs]
My lawn is all at the back of my house - but I guess they could always climb up and watch. It might get more attention than the flapping knee length short, old tennis shoes and BIG frayed t shirt. I am not talking self neglect here, but comfort. A halter top, short shorts, and high heeled sandals perhaps??