Gage doesn't kiss on the lips, he didn't like to be kissed not when it means intimacy. Those were the small moments he used to indulge when he was with his late wife.
But when Bree kissed him, Gage did not retreat, he didn't want to pull back from the kiss like he always does with other women. He realized that wanted her, god knows he did, and he felt like a manipulative boss who second-guessed himself whenever Bree was near.
He kept assuring himself that he would have Bree just like Jade, everything worked out between them. Gage wanted Jade and he got her out of his system a couple of months later now both kept their professional attitude and she stayed working at Babes to support her kid while Gage helped whenever he can just because he wanted to.
The man thought he could do the same
