Can I book an itin for two where only one of the travelers is flying first and the other one will wait for CPU?

IAD-LAX r/t
I'm plat/ my wife is GM

I plan book -

IAD-LAX (me) coach + rpu
IAD-LAX (wife) coach + rpu
LAX-IAD (me) first
LAX-IAD (wife) cpu?

The reason I'd like to be on the paid F is to get the PQMs.
doable?