Simply because your SIL believes it to be true , don`t make it so. She is delusional .Parroting what the society wants their members to believe.
And the truly sad thing is , many who have been put out to pasture so to speak , after decades of service with no adequate provision for their changed circumstance in their later life , are left to rely on the congregations generosity they have been assigned , to provide for them out of their own pocket.
And the gullible congregations take that on as though it is a Priviledge to be shafted by the organization .
And the WTB&TS gets off Scot free .
As they have stated : Jehovah`s Witnesses volunteer their time and services with the oversight of the WTB&TS , they are not employees of the said organization ,they volunteer of their own free will , we are not responsible in any way, financial or otherwise , for their actions , one way or another .
The Jehovah`s Witness hierarchy are masters of weasel words and spin ,and it rubs off on the rank and file ,deception used against non believers is construed as theocratic warfare ,an us and them situation.
Ask yourself , why would a young organization , less than 200 years ,re-write their own history`s beginnings to give a false impression of their own beginning ,? If you doubt that ,do more research ,jw.facts,.and even the search option at the top of this page.
I know it must be hard Closer to Fine , but tread softly as you awaken more to the hypocricy of Jw`s some are just naive.
Take care
smiddy