As your profile shows a level 27 Gladiator, I'm going to assume you're talking about Lady Amandine in Haukke Manor. The answer here is that she doesn't have a frontal cleave and so it doesn't matter if you turn her occasionally in order to grab the adds.

In other situations, the DPS will either handle the adds without you needing to tank them, or you should be able to grab them with provoke+shield lob. If you aren't close enough to hit things with Shield Lob, then DPS/healers need to bring things to you.