>>544491327
>He literally had no more reservations about their relationship after he got back that day
that's not true, he says explicitly after the fact that he holds on to the fact that he "hasn't preyed on his baby sister" as one of the few things he has left to affirm his identity and he tries to sweep their kiss under the rug by saying he was "tired" or something
The reason he kissed her was because he loves her, and the reason he stopped was because he can't accept his feelings (tsunderedrew)