LHG:
I understand your attitude, but not everyone sees or accepts things in the manner which you may.
From IC's initial post, it appears he/she was on friendly terms with this woman. As IC continues to attend meetings, this then implies ongoing and frequent association/interaction with congregation members including this woman.
According to the initial post, the behaviour started 6 months ago and has been bothering IC. IC has resorted to speculating over the reason(s) and as there has been no other congregation members mentioned as behaving similarly, the treatment does not appear to be 'official' but only the actions of one person.
Speculating over possible reasons will not resolve the issue or settle IC's mind, nor will relating the experience on an internet discussion board. To get to the heart of the matter, since the unexplained passive aggressive behaviour bothers IC, I suggested that IC directly ask the woman the reason for her behaviour.
If the COBE's wife acknowledges a reason, it is then IC's decision how he/she wishes to react. If no reason or apology is provided, then IC can proceed knowing he/she attempted to resolve an obvious problem which the other party didn't wish to correct or even acknowledge.