Wow.
People actually seem to enjoy this chapter, from reading the comments.
Well, I found it boring, pointless and not funny... I kinda stopped reading halfway through, just checking the nice pictures...
I mean, Lippe is supposed to actually be a fairly aware and intelligent woman inside a baby. She also knows that her family has a bit of an unhealthy obsession with her, from the singing incident...
But we're supposed to believe that she THAT oblivious as to why her brother treats Al like a cockroach?
It's not like Lus is doing a great job at hiding his intent... like in the first pages of this chapter "First, get away from her"... she didn't get ANY clues with that?
So, to summarise this chapter, Lus and Al are in a disagreement, Lippe is dumb and doesn't get why, bunch of dumb and unbelievable excuse spewed out by the two boys, she believes that crap, forces them to make peace and wants them to hug, but from their internal dialogue, it won't change anything at all.
TL;DR: They don't like each other, she's dumb, they still don't like each other.