feel an english equivelent to what she's saying could be "I was fed like a child" or something like that.
pretty normal for people to feed their children like alice was doing with mystia here and being fed like that, i can imagine is a little humiliating for some.
I can't make a good translation, but grammatically:
喂: to feed [啊-]地: adverb of [Ahhh~]
Very literally: All was Ahhh~dly fed inside......
heartbeat The first time I've seen a smile on her face...Really?That's great.smilechew chewUh. It's good...empty~In the end...All of it was fed through "Ahhh~".....
She meant she ate it all by being fed like a small child.