DS2 continually tried to feed with this little mouth ... this tiny little o, when I needed an AAAAAAAAAAAAAAAAAAAAAAAAAAAH style "O"!

It was pretty frustrating, but he did learn to flare more - and the more he found that got him more milk, the more he did it Just by pinkie fingering to break the seal, pop more boob in there, then continue. Repeat.

I hope that your DD's latch improves