My mum is envolved in what I consider to be a cult. While it is a christian church, it isn't a mainstream church, and with the control and influence the higher members of the church have over general members it (to me at least) has alot of resemblence to a cult.
It is very strict, ie no drinking, smoking, swearing, sex before marriage etc. But it also has a very controlling Pastor who interferes in peoples personal lives.
My mother didn't attend my sisters wedding after being advised not to by the Pastor because my sister and her partner had been living in sin for a number of years.
I hardly talk to my mother now, and with my first child due in a few months I'm not even sure if she will want anything to do with our baby as she will be born out of wedlock.
Mum had told my sister a few years ago that if she had children out of wedlock Mum would not have anything to do with the kids - again on advice of the Pastor.
Mum & other members of the church also "donate" alot of money to the church.
While the church has affected Mums relationship with her children, she seems happy and the church does provide alot close friendships and support for her, but I suppose that is part of the attraction to cults and how they exert influence over people.