Anyone pregnant experience lactating around their toddler?

Im in my 3rd trimester and my toddler som woke up tonight crying. I went to go comfort him and when I walked out of his room I notice my nipple had dripped. My milk apparently is coming back in for the new baby, I havent breastfed in well over 2yrs. I know you can leak when your full or your baby is crying but didn’t think I would for an older child crying?! Especially when the new baby isnt even here yet