Toddler invading personal space!!! How to address this?

SmA

So my toddler is 2 and for the past couple weeks she won’t leave me alone!!! At all!!! Whenever I’m feeding her brother she’s laying on top of me. Whenever I’m just sitting down she’s on top of me. She’s constantly touching my belly because it’s saggy and she thinks it’s soft (kinda cute okay) but she punches and sticks her finger in my belly button. She is constantly all over me I can’t get away and I’m starting to loose it. I hate being touched but by my kids is okay. But this is too much for me. I don’t think it’s her brother or anything cause he’s almost four months and this just started. We always have one on one time everytime he naps so she is getting a lot of attention. But omggg how do I make this stop?!?!