AT story about the mother and son got more mess up than it already was, with she cheating on his son because she cheated on her husband whit his brother so she remembered that she was a slut, pretty much explain why she became like that whit her son, and at the end she abandoned the son and run away with his husband brother
Currently Oobayashi Mori and Izuminoaru are the ones I like most in ANGEL Club, it's a shame the censorship spoils the experience. Even so, I hope they get good translations.