As someone who has reached the wizened age of 40 and experienced some unexpected losses, I beg all of you all to wear your things and not be overly precious with them. When I was younger I was way too stringent with things, even my makeup! What if what if what if. What if what happens?
Take that new bag wherever you want to, don sparkle during the day, use the fancy dishes, put on the limited edition makeup, carry the baby AND wear your pretty things. Spit up washes out.
I’m sorry your sister made you feel self-conscious. Tell her she needs to work on her self confidence and if people want to be judgmental that speaks more for them than for you. Jealousy is a really terrible thing to wear.