I understand the feeling guilty. But I've consulted with a T while seeing mine. Actually, I initially started seeing my current T as a temporary consultation, with the intention to return to ex-T...but then decided to just stay with the T I'm seeing now. He knows I've consulted before and seems OK with it. He's said a few times that if I want to take a break and see someone else for a period of time, he's fine with that, and I can always come back to him whenever if I want. I think the fact that you're going to someone else for a specific issue makes sense, and your current T should understand that. I would suggest telling your current T that you're consulting with someone else. It might be better to be upfront about it. Or...if you're worried about the reaction, you could say you're considering it and see what he says. To me, Ts should want the best for their clients, and they should realize that they don't necessarily have all the knowledge/skills that their clients need. The fact that you've talked about this before with T makes it seem more likely that he'd understand why you want to consult with someone else.