Hi, I think your English is pretty good, but I think that's her mother-in-law not her bio mom (like the black haired woman married the older lady's son). I don't think your real mom would call you that and also the way she's going on about having a son, I feel like mother in laws' usually do that to their daughter in law. Older lady might be calling her boy's mother (I mean whatever that boy's name is, name's mom).
Thanks for the chapter.