This dream might have been triggered by you at that time. You could have had some concerns that your wife might not be good enough for your parents. There might have been an incident that made you wonder. There might have been a bit of fear in your heart that your parents might feel that your wife is not well prepared to be a good wife which could lead to a bit of conflict. In your heart, you decided to stand with your wife in case it happens.
Being naked in a spiritual sense means not being prepared for ministry. In a natural sense, it means not being prepared for whatever is required of you. It can be in a job situation or in being a wife or a husband or actually anything you can think of. Like in ministry it could be all just about not being prepared for one particular sermon, so in this case, it could have been about just one little area triggered after an incident. My feeling is that you had a bit of concern about this and that is why you had this dream.