With Jill and the wolf being Chara...

Flowey: Ha-ha-ha, this is about you(Chara)

Sans: Beware, beware, be skeptical
Of their smiles, their smiles of plated gold
Deceit so natural
But a wolf in sheep's clothing is more than a warning
Bah-bah-black sheep, have you any soul?
Chara/Flowey: No sir, by the way, what the hell are morals?

Sans: Jack, be nimble, Jack, be quick
Jill's a little whore and her alibis are dirty tricks

Alphys: So could you
Tell me how you're sleeping easy
Flowey: How you're only thinking of yourself
Frisk: Show me how you justify
Telling all your lies like second nature
Sans: Listen, mark my words: one day (one day)
You will pay, you will pay
Karma's gonna come collect your debt

Flowey: Aware, aware, you stalk your prey
With criminal mentality
Papyrus: You sink your teeth into the people you depend on
Infecting everyone, you're quite the problem
Chara: Fee-fi-fo-fum, you better run and hide
I smell the blood of a petty little coward

Asriel: Jack, be lethal, Jack, be slick
Jill will leave you lonely dying in a filthy ditch

Mettaton: So could you
Tell me how you're sleeping easy
How you're only thinking of yourself
Undyne: Show me how you justify
Telling all your lies like second nature
Toriel: Listen, mark my words: one day (one day)
You will pay, you will pay
Everyone: Karma's gonna come collect your debt

Papyrus: Maybe you'll change
Abandon all your wicked ways
Make amends and start anew again
Maybe you'll see
All the wrongs you did to me
And start all over, start all over again

Sans: Who am I kidding?
Now, let's not get overzealous here
You've always been a huge piece of shit
If I could kill you I would
But it's frowned upon in all fifty states
Having said that, burn in hell

Chara: (Where are you, motherfucker? Ha ha!)

Asgore: So tell me how you're sleeping easy
How you're only thinking of yourself
Alphys: Show me how you justify
Telling all your lies like second nature
Mad Dummy: Listen, mark my words: one day (one day)
You will pay, you will pay
Everyone: Karma's gonna come collect your debt

Sans: Karma's gonna come collect your debt,
Flowey: (She's a li—she's a li—she's a liar)
Sans: Karma's gonna come collect your debt.