[Helix holds his ground, brilliant indigoes locked on those fierce and cold blues. His own narrow slightly as he listens, biting his tongue for a moment. Hearing the other refer to Jethro as his daddy get his blood boiling good and he's white-knuckled in an attempt to keep himself in check.]
He's not--!
[He swallows his words back waiting for the other to finish, knowing damn well Spike won't just stop his rant. So as the other turns to leave Helix needs to correct him.]
That man will never be my father. I will never refer to him as that and neither will you. Maybe you don't fear me, maybe you think I'm a joke, but you keep this shit up and I'll give you a fucking serious reason to believe everything I've said about me.
I was raised and made into a killer and I did so to survive. I want to like you, but fucking call him that again and I swear to whatever fucking power you believe in that I will see to it you always look over your shoulder for me.
I'm fucking serious, do not make an enemy out of me.
[There is almost something a little pleading in it. He'd really rather not have this whole thing go sour but he does want Spike to take him seriously.]