Ps3 linking question

Hello there, i got a little question about ps3 of this game. Me and my gf have both an account, she linked her account to my psn network to play on ps3 while i play on pc. But if i happen to want to play on ps3, if i buy another copy of the game can i still link it to my ps3 network or i need to get a new psn network account and link it to this one? Or if i want to switch my gf account to another psn network i need to contact SE or im basicly screwed she need to play with my account only?

If two witches watched two watches, which witch watch which watch?

Ya i cant say 100‰ but since shes already linked to it i think u need to make another psn account. Worst case senario im sure a call to SE customer support can straighten it out. Only thing is they might be a lil busy given the current server kerzplosion thingy goin on right now