Aimee ended up with Clarmont, actually! I think she really liked that he found her independence an attractive quality, firstly. His noble nature slowly inspired her to be more compassionate, whereas before that she was mostly selfish. I played Aimee as a neutral character that slowly becomes more empathetic, and although Clarmont played a role in that, it was Imogen being framed for murder that was the biggest trigger for her. She didn't kill her husband but everyone who knew her in Revaire treated her like she did and watching an innocent girl get pinned for a murder she didn't commit motivated Aimee to fight for her, since she never had anyone on her own side when her husband died. And at first she approached Clarmont because she figured being with a minor Lord with court approval was a good option; he wasn't so powerful that she would stand out being his wife, but powerful enough and with significant connections that she knew she would live comfortably. She also wasn't particularly interested in leaving Revaire because her siblings depended on her more than their parents and she didn't want to be too far from them.
So, when Aimee told the Matchmaker that she would pursue Clarmont it was out of practicality more than anything, although she was developing feelings for him too. She played those feelings up to be more than they were at that point, but soon enough they became sincere as she realized his support and faith in her was unconditional. The more she uncovered about who he really was the more she admired him, and the more she came to realize that her country desperately needed to change. Not just for her own sake, but for her siblings as well, especially after receiving the letter from her sister. She didn't want any of them to have to live a life like hers. So eventually she concluded that the best way to protect them was to be an active agent in Revaire politics alongside Clarmont. And it worked! She achieved the legendary peace and lived happily ever after :)