Yes, it is still fornication. Ham Sah should not provoke you to have an emission. It should not sexually arouse you in any way. If it is arousing, you should stop immediately and simply meditate on your lust if you can do so without indulging in it. If this is not possible, then go for a walk or listen to some classical music or read some gnostic books or other scripture. Then, later, go back to the event and try meditating on it again.