Ariel was the one to kiss Carter unintentionally, the last time she came into his room but this time Carter did the kissing.
The kiss they shared together the last time was more affectionate and passionate than the one they were sharing now. Ariel didn't like it because it was wrong of her to be kissing her sister's mate when the both of them had finally patched things up and became friends after years of holding grudges against each other.
Carter kissed her and tried shoving his tongue down her throat but Ariel resisted him. Does he not give a fuck if Avril comes into the room suddenly and find the both of them that way on the night of her mating ceremony with him?.
Carter didn't give a damn due to the way he was busy trying to shove his tongue down her throat, not minding whether Avril was going to catch the both of them or not.