Thank you everyone for the comments.
I'm flying tomorrow and just did the online check-in. His boarding pass does not have SP logo, but the boarding zone (in CDG) says "Zone 2" for him which mine does too so I guess, because I bought both tickets at the same time, he is eligible for priority boarding (otherwise his ticket would say zone 5 or zone 6 with no FB membership).
As you guys said, I'll manually or humanly ask for the priority security (it will be crowded I guess on Saturday morning?) and he can come to lounge with me, and zone 2 boarding with me. Guess problems solved!
Thank you very much again!