A bit of both

The position you are in right now seems just perfect. Mia is still moving her cock up and down your throat and you are still stroking Ava's dick with your right hand. Their breathing and moaning pick up, and you feel their cocks get hot and start to throb even more. Mia slowly loses her grip of your head, giving you more control over yourself. You start making your blowjob more and more rough, as you can't wait to taste Mia's cum. Ava uses her hands to stroke her shaft, so you move your hand closer to her tip, rubbing and squeezing it hard, stimulating her more than ever.

A few seconds later, the girls cry out in ecstasy as they both orgasm. You bring your mouth back so that only Mia's tip is covered by your lips. Right then, a giant load of jizz shoots straight into your awaiting mouth, already filling it halfway with cum. Your tongue swirls around in the pool of cum and saliva in your mouth, and you get a good taste of Mia's seed. Her sperm tastes slightly metallic, but with a hint of sweetness to it. You decide to keep it in your mouth for now. However, you find that to be harder and harder, as more and more waves of cum get planted in your mouth. Of course, Mia is not the only one cumming. Ava also shoots huge ropes of cum all over your face, coating it in a hot, white, thick and strongly scented glaze.

After a minute long orgasm, your cheeks are stuffed with Mia's hot and sweet cum. You carefully slide off of her wet tip, making sure that none of her jizz spills out of your mouth. You tilt your head up and open your mouth wide, hoping to get some more cum in there. Ava obliges and squeezes out a few last drops of her spunk in your mouth. You close your lips and take a moment to play with the cocktail of liquids in your mouth, after which, you swallow the batch with a big gulp, sending shivers down your spine. You look back up at the two tired girls, and they look down at you with tired eyes.

Suddenly, Ava looks at Mia and says: "Hey, wait a minute... Why the hell did you swallow her load, but not mine?"

Mia replies with a smirk. "Maybe it's because he likes me more. I wouldn't be surprised, by looking at my competition..."

Ava looks shocked and mad, and yells out: "What the fuck did you just say to me, bitch?"

Before you know it, the girls are back at it again with their arguing. You feel like it's best if you just got out of here now. You pick yourself up and slowly walk back without them even noticing. Your room door is open, so that must mean that the test is over. And even if you didn't get them to get along in the end, you got one hell of a mouthful of delicious dick-girl cum, and that's more than anyone could ask for.

You wash out your mouth from Mia's cum and take a breather.

You got the "Half and half" ending with Ava and Mia.