How to lose weight in specific area

I am 31 and have struggled with two areas of my body. My arms and my booty! My husband has no complaints but it’s really annoying to me. I would literally be in a size 8 or 10 jeans if it wasn’t for my big booty. I wear a 16! And it’s only my butt. I hate it, it’s huge 😂 I know it sounds silly. But I do feel self conscious that its too big. What can I do to help slim it down? I was told to not get on a stationary bike because it would make it bigger lol..