A certain day before Scáthach  was summoned as a servant, she was lecturing her disciples in "The Land of Shadows"...
What an unsightly view, you all were this weak. It's because all of you are virgins. Geez, it can't be helped, I'll become the "virgin killer" I was long ago! (Try to avoid double punctuation. Capital "G" in geez.)
In truth, I only call the top-class warriors to my bedchamber, but... you virgins are special. Come on, all of you show to me, Scáthach, your pathetic "lances"!(Does she refer to herself in the third person  like a title? If so that's accurate.)

*
I only touched you just now, and you're all already this hard...even though your ability with the lance is a shame, only the lances between your legs are top-class.
I'm going to stroke you guys with more strength, if you all are my disciples, you will be alright with that, right? Show me that you can satisfy me with your hard dicks.

*
I can’t believe you’re cumming in the face of your teacher. God...  being this pathetic before put it in me.
you should be ashamed, are you really a Celtic man? (Either the first part should possibly be "I can't believe you're cumming on the face of your teacher" or "I can't believe you're cumming in front/in presence of your teacher" In presence sounds more regal.| Capitalize Celtic)

*
You that came early/prematurely(prematurely is more sophisticated.), you need to be punished. Show me that you can endure it.
I'm going to forge a lance that can satisfy any woman.

*
fumu... With this amount, eh... I'll give you 3 stars. There are some disappointing points but, it can't be helped.
If you've had enough foreplay, shall we start the real thing?

*
Look well, this hole will be the hole that is going to kill your virginity.
You had best aim well. Do not put in my anus for it won’t count there.
Prove to my pussy that you're all Celtic men. (Phrased differently due to previous lines)

*
Come to me, Ulster men.
Thrust your hard dick in my pussy, make me feel well by stirring up my insides.
Yes♥ Like that... Deeper.

*
Very well, you're doing well, the way you’re thrusting your dick in my pussy looks very manly.
The sensation of your virgin penis kissing my womb feels so good.
Do it faster and more aggressively!

*
Uuuh!?
Idiot! Even though I said that it won’t count there…
You can't even properly wield your lance, eh...? It looks like your training is lacking.

*
I'll give my stupid disciple one more chance.
Come on, this time look well at my open pussy...
Satisfy me by thrusting your pathetic dick in here.

*
Yes...Ah! Very well, do it like that.
I can feel your dick becoming bigger, and harder.
Try to move with enough force to push it all the way into my womb! Satisfy me lots!

*
Teacher Scáthach, I'm cumming!
Cum!!
Pour all that virgin semen in your teacher's womb!
I'm...Cumming!
Teacher, I think I'm cumming!

*
Teacher!!
I'm cumming!
Uuuuuh!! Yeah...Ah!♥
Teacher… Scáthach!

*
This virgin killer has completed her job. All of you should have improved your abilities at least a little after this.
The next one who wants to have sex, fight me and win...
Then will can thrust the lance between your legs in my pussy.
Well, I'll wait happily for the day you guys be invited to my bedchamber♥