Breastfeeeding with finger in their mouth??

S • 24. Married. First time Pregnant!

Any other mommas have a little one who’s baby is constantly nursing and sticking their fingers in his/her mouth? She’s gotten so good at it she can still create a suction but it’s so frustrating because it keeps coming undone. I can remove the hand multiple times but in a goes right after! She’s 16 weeks!