My wife does this too but she doesnt act like she is showing to anyone specific she just doesnt seem to care about closing the curtains or even hiding it. For us it would be more general like hotel and shes nude at night and I tell her that people can see in better when its dark out and we have lights on and she said let them look. Or she changed her shirt when a workman was in the house and probably saw her topless, not sure but he was around. When she lost her baby weight she would wear sundresses with nothing on under and I know this because I was told by another guy. But she also wore shirts braless and could lean over and let a guy see everything at times when we are out and she gets off on men wanting her.