A Slippery Slope?

This week has been a drag at the office. Same old meetings and emails, but it's been affecting me more than usual. I've felt this lingering desire for something new in my life. So when my partner suggested we try an open relationship last month, I agreed just to shake things up a bit. It hasn't really changed much on her end, she's still committed to us, and we talk every day about how we're feeling. But me? Well, I've started talking to this guy online, someone who knows my kinks and fetishes inside out. We haven’t met yet, but the conversation is electric with the promise of what could be, an escape from my daily grind. It's thrilling and terrifying at the same time. Today, we finally took it a step further. He sent me pictures that pushed some serious boundaries for me, and I found myself responding in ways I never thought possible. Is this okay? Should I just keep things status quo with my partner and stick to talking online? Am I crossing lines by getting so into these messages, even if we're both consenting adults?