These kinds of icky-sticky sentimentally self-serving stories proliferate in so many Christian churches and religions. sadly, the JWs are far from unique: Mormons have their own variations, as do Seventh-Day Adventists, and let's not get started on the myriad Pentecostal groups that regurgitate this kind of Reader's Digest crap!
In my view, having one's mother send this kind of drivel is grounds enough for disowning her. I would consider any mother who sends this kind of crap to deserve being disowned (On the other hand, fathers can get away with it because they probably don't know any better ). Seriously, if your mother knocks, keep very quiet and don't answer. Just hope she's so busy passing this kind of crap on that she soon forgets you exist.