Need suggestions (again)

The last time I posted here with a masturbation in moderation idea, I got properly criticized and I'm grateful to you for that, I've tried to stay clean. Relapsed several times, but I'm trying.

But I've just got into a new problem. I'm in a long-distance relationship with a girl. And sometimes, our conversations become a bit... Ahem... Stimulating? As it did yesterday, and I relapsed. What am I supposed to do?

Edit: Should we refrain from bringing such topics up?