Author's Note: Ok, lets see how the Tyrell and Lannister alliance is going now that the Phoenix has Ser Loras Tyrell hostage.
A Lannister army lead by Tywin Lannister has marched in the Reach (where stands High Garden which was recently retaken by soldiers of the Reach) to aid the Tyrells from the Ironborn that have invaded. Tywin sees and approaches Mace Tyrell, with Tywin is Bronn, Tyrion hired killer.
Tywin gets off his horse and approaches Lord Mace Tyrell who has left Kingslanding after hearing about the Ironborn invading the Reach.
Mace: Lord Tywin, thanks for coming. We apprehended 1500 Ironborn led by Victarion Greyjoy. He gave us a fight.
Tywin: How many men did he have besides 1500. Before we got here.
Mace: 3,000 men, they almost made a run for their ships until House Redwyne came to our aid. Blocking their escape.
Tywin: Good. Where wis Victarion now.
Mace: Held prisoner. Ready for interrogation.
Tywin: Allow me. Ser Bronn!
Bronn comes rushing over.
Bronn: Yes.
Tywin: Take one of my best interrogators and see what you could get from Victarion Greyjoy. The Greyjoys are aiding the Phoenix and they must know something. What he planning? Where he going? Anything.
Bronn: Yes, Lord Tywin.
Bronn and the interrogators are being lead by Tyrell forces to where Victarion are being held.
Mace: We could probably use Victarion to convince the other Greyjoys to have the Phoenix release my son.
Tywin: It's not going to be that easy. Euron Greyjoy is the captain of the fleet, he very dangerous 2nd only to the Phoenix. We should focus on trying to capture him and see what he knows.
Mace: But my son.
Tywin: If the Phoenix is smart... then he would know better to oil your son. He doesn't have the numbers to fight both of us.
Mace: What if he does kill my son?
Tywin: Then we'll charge at him immediately. But we have to wait for a good opportunity for him to be out in the open.
Olenna Tyrell is hearing all of this.
Olenna: Lord Tywin... if you don't help me to get my son back, then our alliance is over.
Tywin: (Angrily) What did you say?
Olenna: I'm saying we need to act now. Because if he dies then the marriage between your daughter and my grandson will never happen and your control of the South ends.
Tywin: I would be careful what you say next Lady Olenna. I am the King Hand after all.
Olenna: What are you going to do? You lost many of your forces by this sellsword, your best soldier the Mountain is dead and most importantly because of your prideful attacks on other regions and houses in Westeros; they had no choice to join the Phoenix to avenge what you all because you were building a family dynasty. But what your too ignorant to see is that this future for your family dies with you all; because you push your own children away.
Both Lannister men and Tyrell men are hearing this.
Tywin: What do you want me to say or do then?
Olenna: I want you to admit that we have all been outmaneuvered, outsmarted, and bested by a much more devious mind. I want you to take this man seriously!
Tywin: I am! Helping you's retake your home will give us more loyalty of the Reach, once when we rid the Reach of Ironborn well march in the Riverlands and wipe him out for good. Ending this foolish war once and for all.
Olenna: Keep telling yourself Lord Tywin. This Phoenix has won this war before it even started.
Tywin: He hasn't won. Not as long as I'm still breathing he hasn't. House Lannister will still stand, The Lion will the Fiery Bird where even it cannot resurrect itself.
Tywin walks away towards to where he will be camped. In the Lannister forces are carriages, where Tommen is being held. They too heard the argument between Tywin Lannister and Olenna Tyrell.
At Casterly Rock, near the ports of Lannisport, A ship from Kingslanding has been docked. Coming out of the ship is Cersei Lannister, who seems angered by being force to leave her son behind.
She is being escorted by some of her father men.
She gets in a carriage that is leading her to Casterly Rock which is in the distance.
In the dungeons of Harrenhal, where Ser Loras who has grown a beard is being held prisoner. Oberyn Martell, comes in with water and some food. Oberyn has removed his bandages, for which his eyes are completely healed.
Oberyn: I thought I might keep you company.
Ser Loras isn't saying anything.
Loras: You do know if I'm killed my family will retaliate.
Oberyn: My house didn't. When my sister Elia and her children were killed by the Mountain I wanted to assemble the armies of Dorne and strike at the Lannisters. Of course you have Jon Arryn to thank for that, for he stopped us. Well none of that matters now, The Mountain is dead, your home is being invaded by the Ironborn and Daenerys Targaryen is almost coming to Westeros, taking your family out of the fight of power with the Lannisters.
Loras: That's nice, but my family will get me out of here. There really good with negotiations, and I don't doubt they negotiate with that man that calls himself the Phoenix.
Oberyn: You do know, that Dorne is assembling and finally joining this war to help the Phoenix.
Loras: Again, my family will get me out of here, they have other allies.
Oberyn: You mean like Lord Petyr Baelish. Residing at the Vale, a region that never gotten involve in the War of the Five Kings.
Oberyn placing his hands on Loras knees.
Oberyn: Don't worry the Phoenix has every intent not letting you go, just not yet. Until then...
Offering Loras the water and food. Loras has no choice but to take it.
Back at Highgarden, Tywin Lannister with his war council going over their strategies.
Tywin: Euron Greyjoy, is not in the Reach. Nor the entirety of the Ironborn forces.
Mace: Then where is he?
Tywin: Sailing at the Westerlands. Doesn't matter, your men will accompany me and my forces...
He looks up and heres nothing but silence.
Other banner man of the Reach want to say something, but instead they wait for Mace Tyrell to say something.
Mace: We can't come.
Tywin looks up.
Tywin: What?
Mace: My son is captive, and the Ironborn are aiding the Phoenix. I can't risk my life son life. I'm sorry Lord Tywin but I'm afraid my bannermen will not march, until my son back.
Reach Banner Man 1: With the Lord Tyrell heir life in danger. And there nothing we can do about it physically. We all talked, were going to negotiate a truce with the Phoenix in exchange for Ser Loras Tyrell.
Mace: Your on your own Lord Tywin. This alliance was destroyed the moment you lost Harrenhal. I will honor the marriage between king Joffrey and my daughter, but The Reach cannot offer military support. We'll keep Prince Tommen here for safety as you requested but...
Lord Tywin slams the table in a fit of rage. Still prideful not to admit defeat though.
He walks out angered and disappointed by his allies.
So how do you guys like that, I know that the dialogue between Oberyn and Loras doesn't make sense. But because since both lay with men, it just seems better if they had words with each other and having Oberyn gloating of defeat of the Lannisters.
The Phoenix took a powerful alliance and destroyed it as if your burning down a castle.