Three-Way, interesting. At first she hated Lacus, it would be funny if she ended sharing the same Man with her. LOL.

PS: I Believe Kira killed Nicole on instinct. He didnt even take any military training, he just ended up piloting a MS a fighting his childhood friend, the stress he was going through, plus finally attacking Athrun on a 1vs1 basis. He just wasnt in his best moment, a mistake like that is acceptable or to be expected.