How do you fell about selling “hand downs”?

So I decided to sell some baby clothe well because a little something back won’t hurt but than my sister in law made a big deal out of it and started commenting.. her and her husband about the clothe being there daughters at some point. This really got me angry because it’s like them throwing a party and me giving them clothe as a present and if they sold it I wouldn’t mind after it didn’t fit. I mean it, i wouldn’t mind. What do you all think ? I mena she never said I couldn’t and once I tried to she just tried embarrassing us on social media ad if it was a sin to do that. I am pretty upset about this.

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