Well despite your distrust of Jack, Henry's always been alright and you could use the easy money. If it doesn't sound like a good deal to you, you can always decline. You sit down with them both, keeping a constant eye on Jack, well his clothing anyway.

"Hey Wolf, glad to see you, it's been awhile. I remember when we used to tear up places like this back in the day." Henry says.
"Yeah, the good old days." You say agreeing.
"When we were young and a lot more active."
"Speak for yourself Henry." You stand up and start punching and kicking. "I'm still active and I'm only as old as I feel which isn't old at all! I can still… OW!" you get a slight sprain in your back when attempting to demonstrate your "youthful" combat abilities.
"No, Wolf you're not old at all." Jack snickers.
"Shut the fuck up Jack, I just haven't been in a proper fight in awhile, I'm a little out of practice. Say, how about I practice on YOU?"
"Uh, okay calm down Wolf! Jack! We're not here to antagonize anyone!"
"You're right so let's get all this catch up shit out of the way. Wolf, we got an experiment for you that should be right up your alley. It involves you testing those skills you claim you still have."
"Oh yeah? What kind of experiment is this?"

Henry interjects before Jack can continue.

"Well the government hired us to develop something that increased combat ability. We've been testing it on humans and the results have been good so far, however we want to see how good it is, so we wanted to test them against non-human opponents, you came to mind since well you ARE the Alpha Wolf and despite your age, you are probably the best the Werewolf race has to offer as far as combat skills. I figure you're still worth 10 of the cubs nowadays. Plus I know you like to kick ass and get paid for doing it. You know how the government likes to throw money around when it comes to new weapons, so I figure we can spare five thousand for your help."

You decline

Maybe it's your sixth sense or mistrust in general, but you don't really like the sound of this. Henry might be an alright guy, but you really don't trust Jack and you've had problems with Mad Scientists before. Maybe if you were younger you'd take the risk, but you're a lot wiser now and you're not about to set yourself up into going into a bad situation that you might not be able to get out of. You're not scared, you're just not stupid. You decide to decline and make up an excuse.

"Well it does sound like fun, but unfortunately I've got a job from Erik recently that I need to see about tomorrow, so I'll have to decline."

Henry looks very surprised at your answer; it was almost as if he thought you'd immediately take his offer. He attempts to convince you further, but you continue to decline which makes his voice and inflections sound more desperate with a hint of anger in them.

"We were fucking friends Wolf! You're going to leave me hanging like this?! Fucking ingrate! After all the fights I helped you in too!"
"Henry, you better just fucking mind your tone. And half those fights I distinctly remember you starting and ME having to finish them!"
"Why you fucking…" Henry stands up, which you do too daring him to do something, but naturally he realizes he isn't in "Hyde" form, so he backs down. Jack eventually speaks up.
"Come on Henry let's go, we can get someone else."

Jack hands Henry his coat who's still giving you the hard stare. Just before they leave Henry has to get another word in.

"Fucking yellow dog! You oughta be put out of your misery! The Wolf I knew would've jumped at this chance, I don't know what happened, but you ain't him! Fucking mongrel!"
"Alright Henry shut the fuck up, before he kicks your ass EEEK!"

Jack gets out of the way when he sees you charge at Henry, he doesn't stand a chance in his human form and you beat the hell of him.

As he lies on the ground bleeding and pondering his poor choice of words, you relay a question to him.

"Is that more like the Wolf who you USED to know? And Jack get your invisible ass outta here, before I tear you a new one too! I'm not falling for whatever fucked up scheme you had planned for me!"

Jack quickly drags Henry out as quickly as possible, while you go back to drinking.

After drinking your drink, you head back home and decide to call Erik up tomorrow who'll hopefully be less annoying and actually have a job for you. Turns out he does and you end up having to show up at a comic convention as a special guest. It's not exactly exciting for you, but then at least you don't have to get your head bashed in to get paid.

"Oooo! Ooo! Mr. Wolf! In Lycanthrope Terror #6, were you supposed to be immune to the silver dagger because you had sex with the witch who granted you extra powers in the beginning, or was it because you had been sent directly from Hell and thus had demon blood in your veins giving you extra powers? Because their problems with both of those things, because if…"

The nerdy human goes on for another 10 minutes pointing out plot holes when in actuality there isn't one, since the fucking dagger wasn't silver at all it was just really shiny steel, and if he'd paid as much attention to movie then he did his own whiney voice he'd know that.

Come to think of it, maybe getting your head bashed in might be preferable.