Advised to lose weight by mom

So i have had varying eating issues for the past 2 years, and shown severe signs of low self worth that my mom recognises, and always tells me how beautiful i am and reassures me all the time. However, there’s a relative’s wedding in the next month, and she told me that i needed to workout to acquire a good looking body, because everyone is gonna be there. I genuinely feel hurt, because i feel like i am not good enough for her to showcase me to everyone, ans thus i am not good enough in my day to day life. and i know my mom is just brutally honest and doesn’t sugarcoat anything and the fact that she said that means that i have an ugly body. It kind of messed up all the inner work i have been doing so far and feel so bad because of it. I don’t know what to do :( especially since i have some fat on me but i would argue it’s some healthy fat and nothing that looks unhealthy or overweight, although not especially aesthetically pleasing by today’s society standards.