No rude comments

So ladies im 8 months postpartum. I have 2 weeks that joined in the gym and im paying for a trainer. So far i like it and I put my hard work everytime i go to the gym alone with eating healthy. But today someone told me that my belly doesn’t go away me working out, that in order for me to have a flat stomach I will have to get a lipo or a tummy tuck. What do you guys think??? I seen women with bigger stomach than mind and they lose it naturally