Toddler obsessed with boobs?

Jordan • 21, Married, Mama of girls👑

I breastfed my daughter for fourteen months, she self weened due to lowering sippy when I was about 15ish weeks pregnant. She’s now 19 months and all of a sudden obsessed with my boobs, constantly pulling on my shirt and sticking her hands in there saying “boob boob” which is totally not normal for her. She hasn’t asked for the boob since the week she weened. I take her in the shower with me most days or I’d never get to shower and even then all these months she’s never acted curious about them. Her sister is due any time and I’m starting to get concerned with how she’ll be when she sees me feed the baby. Anyone go through this or have any advice?