The latter.

[Since he probably won't openly accuse Lust of murder a second time... maybe... we'll see what the future holds. His friendliness isn't a lie, but at the same time, he's only considerate when he wants to be.

Like now; his voice isn't cold, just matter-of-fact.] 

I'm sure it won't surprise you to hear it, but let me be clear. I don't believe I'm the strongest person here. [He seems fine with admitting that; there's a reason he's not on Team Pride.] But I do intend to overcome that.

I have no personal interest in any noncombatants. The only joy I take out of this is the thrill of a good fight, and the promise of greater power at the end of it all. But I would rather a tasteless victory than a sweet loss.

[He's not going to hold back for a silly reason like personal morals. At the end of the day, ruthlessness is his guiding principle.]

But there's no need to trouble you with it, if you find it distasteful. It's your choice.

[If Lust says they're fine with it, then, well. He's not going to treat them like a child. But it's an out, if they want to take it.]