Big Sis feeding Little Sis

I was doing laundry one day and while I was gathering and sorting clothes in our closet I hear Audrey "ah, ah" silence "ah, ah" silence "ugh, ugh". At first I dropped everything and was going to see what was going on, then she stopped. A little puzzled I continue gathering laundry. And of course it happened again and again. Finally I had to see what was going on... did Ava have her hanging upside down somewhere? I couldn't imagine what was going on. As I round the corner this is what I see (see below). The silence is when she had her mouth full, the screaming when she wanted sister to feed her some more. I had a mess to clean up but it was rather cute. (so cute I had to take some pics)