and because Mrs Kwin said the same to two elders.
Okay but watch out. Mrs. Kwin did a bad thing there
From the OD Book page 148-9
If the one who committed the offense accepts responsibility, seeks forgiveness, and straightens the matter out, there is no need to carry the matter further. This shows that although serious, the offenses here discussed are limited to those that can be settled between the individuals involved. This does not include such offenses as fornication, adultery, homosexuality, blasphemy, apostasy, idolatry, and similar gross sins. (1 Cor. 6:9,10; Gal. 5:19-21) These sins require more than forgiveness from an offended individual. Since the spiritual and moral cleanness of the congregation may be threatened, such matters should be reported to the elders and handled by them.—1 Cor. 5:6; Jas. 5:14,15.
If you are not able to gain your brother by 'laying bare his fault between you and him alone,' then you may do as Jesus said—take along one or two others and speak with your brother again. Those you take with you should also have the objective of gaining your brother. Preferably, they would be witnesses of the alleged wrongdoing, but if there are no eyewitnesses, you may choose to take along brothers to be witnesses to the discussion. They may have experience in the matter at issue and may be able to establish whether what occurred was truly a wrong. Elders chosen as witnesses do not represent the congregation, since the body of elders has not specifically assigned them in the matter.
Notice that bit in red, a legal disclaimer if I ever heard one. This means the elders who "witnessed" Mrs Qwin statement are not necessarily representing the WTS (from a liability standpoint) even though they are elders!
If you need the new OD book PM me. You might find it handy.