My weaned two year old.... wants to nurse

Merida

I nursed my daughter for 17 months. She is now 27 months. I am 30 weeks pregnant. Every so often she likes to snuggle skin to skin. Last week she tried to nurse on me again!

I don’t know what to do! First it hurt very bad bc she is so much stronger. Second in 10 weeks I will be nursing her little sister all the time. What should I do??