Hmm. I posted a "joke translation" in the other thread...
Anywho, what's really going on is that the girls are giving Ash chocolate (Misty is like, "It's not like I like you...I just had some extra", Dawn is like, "Mine is beautiful, right?") and Brock only gets chocolate from his Pokemon. Haruka/May ate the chocolate that she was going to give Ash, and is apologizing for eating it.
My joke translation is way better, though.