I am sure she is older than that and the article was March so dependant upon her birthday she might be upper end of 12 by now.
I will do a bit of digging
Philip PERRY. Philip married Elizabeth "Liz" CHENEY.
They had the following children:
Kate PERRY was born in 1994.
Elizabeth PERRY was born in 1997.
Grace PERRY.
Philip Richard PERRY was born on 2 Jul 2004 in Sibley Memorial Hospital, Washington, D.C.