Good decision Mao. Happy ending here we come.
Also, the mom saying she'll "find a good man" kinda pissed me off, as if she didn't cheat on a good man and throw him and her daughter away once she was caught. She definitely has more 'growing up' to do if she can't even spare an apology. She probably didn't think about how the dad would feel if she took Mao, but she probably didn't care either.
Well, water under the bridge. At least everyone was able to move on in the end.