Forum:Have I messed up both potential romance subplots?

So I've been playing as a renegade female and having my character romance both Kaiden and Liara. I've just completed Feros as my third world (leaving only Virmire to go), and now neither of them are saying much in the way of conversation. I took both of them with me on the mission and made mostly renegade choices: I killed all of the colonists, explicitly told my team mates that we were going to shoot kill and screw the sleeping gas, killed the Asari clone after at the end of the mission, and was just generally an ass to everyone on the planet. I didn't think this would have any impact on the romance subplots because I also took them both with me to Noveria, where I was an ass to Liara's mother and killed the Rachni queen; yet the romance lines continued just fine once I was back on the Normandy.

Now, back on the Normandy after Feros, neither Kaiden nor Liara have anything to say in the dialogue wheel other than the most basic, generic stuff; and Kaiden is now ending the conversations with "Commander" instead of "I'd like that." I haven't been a jerk to Kaiden at all, but I did say one renegade line to Liara during the post-mission debriefing: the one about Shepard's head feeling like it's about to explode, where she says, "How do you think I feel!" Other than that, I replied with neutral answers: I didn't decline her offer to probe my mind, and I supported her going to see the doctor.

So yeah, Kaiden and Liara are being awfully quiet now. Did I mess it all up? If so, how? (I don't have a save file from before the debriefing, either.)