Here's an example of how the Mormon church uses the idea of forever families to manipulate their members.
The Mormon church teaches that to be a forever family you have to be sealed in the temple.
To be ~*woRtHy*~ of the temple you have to pass a worthiness interview.
When I was growing up, the only question in the worthiness interview that had a follow up meeting was the one about paying them money. It's "Tithing Settlement" in the cult jargon.
If you DON'T pay them money, YOU CAN'T BE WITH YOUR FAMILY FOREVER.
It's a cult.
Thank you for coming to my Ted Talk.