So tomorrow's my brothers fiancés baby shower and my mom tells me dress up . One I don't dress up .…

So tomorrow's my brothers fiancés baby shower and my mom tells me dress up . One I don't dress up . All I owe are shorts, tshirts , sweat pants , and regular pants (can't fit the jeans right now ) and she tells me to wear sweat pants and it's supposed to be 91. I walk around in my underwear and tank top because of hot it's been and she's asking me to wear sweatpants .My mom should know I don't dress up at all . It's a baby shower most people don't dress up unless it's for the soon to be parents .