Buying things on PSN

Hey my brother in another state is gonna buy add on content for Last of Us Remaster (The Frontier rifle) and I was wondering if its possible for me to use that add on content as well if either of us sign in to the PS4 account. Is that possible or would i have to buy it separate for myself?

yes you could use it.. its linked to the account

yea as long as ur both logged into the same psn account u can share content between 2 ps4/vita/psp/ps3 systems (atleast i think its 2 it may be 3 or 4)

i let my brother share my psn account so he has access to all my ps3 and psvita games