Is it a big deal my nephews friend saw me naked?

My husband and I are living with his brother, because well they have free apartment in the house they own and we get along fine.
They have 4 kids, the oldest one being a 14 year old boy. Our bathroom is currently getting renovated, so we use one of the downstairs bathrooms

So I was having a shower the other day when one of my nephews friends walked in. And he didn't leave he was just staring at me until I told him to get out
When I told my husband about it he said not to worry about it and that his nephew was probably gonna get a lot of shit for it. Really? I feel kinda guilty because I didn't lock the door.
But i don't know why they would tease him about it
Is it a big deal my nephews friend saw me naked?
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