Who exactly is "they?"

The cousins range in ages from seventeen to forty-two.

After Thanksgiving dinner last week:
The cousins didn't want to leave, so they didn't want to leave.
The cousins wanted to watch a movie, so they wanted to watch a movie.
The cousins wanted to try the Creme de Vie, so they wanted to try the Creme de Vie.
The cousins wanted to spend the night, so they wanted to spend the night.

Who are those demanding copycatters?

Here's a hint:  They are not my kids and they are in their nineties.  ;-)

Ay, Dios mio!