that would be because its birth mother gave it away to an oneesan, and disowned it.
also, Is the larger alice using an accent or something, because I am having a WHOLE lot more trouble translating its speach than I should for such a small amount of text.
From the series mother took sack alice out for a walk. Sack alice spotted a marisa-alice family and went to them hoping to be taken away. alice said they'll ask the mister or miss to help sack alice find its mother. The mother tearfully begs mister/miss to give back the child. Sack alice cries and was misinterpreted by the mister as wanting to go home.