After this chapter I will be accepting prompts about Joanna. They will be max 500 words and I will try and complete every one unless it contradicts what I have planned for the story. I will upload them as a different story. I hope to complete each one within 24 hours of the suggestion but I apologise if it takes a bit longer.

This chapter will be entirely Joanna/Joffrey interaction and has some adult scenes towards the end, just to warn you.

Joffrey

"Stay away from the Stark boy." He grabbed his twins arm, pulling her to the into an alcove aggressively.

Shaking his arm off she smiled, "which one? The little boy the same age as Tommen? Or the bastard who looks like Lord Stark? Or could you possibly be referring to the one Myrcella was looking at? Really brother, what do you think of me." Sarcasm practically dripped from her words as she kissed her twins cheek.

Joffrey grabbed Joann's waist and pulled her so that their faces were almost touching. "You know exactly which one I mean. Robb Stark was about to rip your clothes off right there."

"Don't be paranoid Joffrey, it doesn't suit you. Besides, father is beginning to sort out suitors for me anyway. Don't you want me to have a husband who actually is attracted to me? Do you want me cursed to have the same loveless marriage our parents have?"

His hand slipped beneath her dress as he whispered in her ear. "When I am King I won't let you ever leave my sight."

"Now I see," she laughed, "you're jealous."

He spun Joanna round and pushed her against the wall, his slight height advantage allowed him to tower possessively over her. "I am not jealous. You are mine and one Lordlings affections isn't going to change that."

Joanna pushed him away, "I'm not going to marry you Joff. Our love isn't going to have a happy ending. Father will make me marry and I will have my husbands children. You know that if I had the choice I wouldn't marry anyone but you but unlike you I am a princess and my future has been decided. I'm not going to marry you or have yourchildren despite everything I want. The sooner you accept this the better. Besides, when you are King, what will you do? Make me divorce my husband and make me leave my new family and drag me back to Kings Landing. You know how easily rumours spread, doing this will be like telling everyone in Westeros that you want to fuck you sister."

This was the angriest Joanna had ever seen Joffrey, his body was literally shaking with anger; he looked ready to explode. His mouth was unable to form words.

"What are you going to do? Hit me? You lay one finger on me and you'll have turned into father."

"I am not our father!" He spat menacingly, tracing her figure with his hand, slowly moving downwards, "Our father doesn't want to fuck mother. I most certainly want to do it to you. This situation isn't easy for me as well. Father is probably arranging me to marry the oldest Stark bitch right now. I'll have to marry her and have children with a girl I am not capable of loving."

Joffrey grabbed her face and kissed her aggressively. Forcing his tongue into her mouth and resistance immediately disappeared and he deepened the kiss. A moan escaped Joanna's lips as she wrapped her arms round his neck. One of his hands left her head and rested on her chest. Any sounds of pleasure were muffled as they didn't stop to breathe.

Approaching footsteps made them immediately separate and within seconds they had returned to the collected and proper façade. Their uncle Jaime passed by and saw his niece and nephew standing into the alcove discussing their first impressions of Winterfell. Seemingly unsuspecting he smiled.

"I am to be guarding your room tonight, Joanna. Should I escort you there now?"

The twins shared a quick glance before Joanna took her uncles arm and nodded, "Of course Uncle. Lets finish our discussion later, Joff."

The pair left and Joffrey scowled at the interruption. He didn't understand his sisters connection to their uncle. Apart from himself Jaime was the only person who could truly make Joanna laugh. Their mother paid Joffrey the most attention but everyone else never seemed to show him the love that he desired. Everyone, except their father, adored Joanna and even when Cersei criticised her Jaime would stand up for Joanna and the fault would be forgotten almost immediately. Joffrey had to love Joanna the most and if that meant isolating her from everyone else she loved he would do that.

The most rational part of his brain told him that this love could never end happily. In an ideal world he would marry Joanna and together they would be surrounded by blonde, green-eyed children who looked just like his beloved. Unfortunately, they were not Targaryens, the world would never accept their love and dismiss it as monstrous despite the previous rulers marrying brothers to sisters for centuries.

The less rational, more dominant part of him insisted that they were nothing like the Targaryens, that madness would never touch any children they had and if he had to force the seven Kingdoms to bow before the sibling rulers he would. He would destroy cities and kill whoever it took so that he could have his sister by his side. The thought of his sister sitting beside him on the Iron Throne wearing a golden crown stirred something within him that would not die down.

Until he could see Joanna next he would have to entertain himself so he went to find the oldest Stark girl who wouldn't stop smiling at him. She wasn't as pretty as Joanna or as funny but she would have to serve as a distraction.

So that's Chapter 4 done. I think this chapter shows that despite Joffrey truly caring for Joanna he is still highly unstable and is unable to see the difference between love and the possessiveness he feels. He claims he never wants her to hurt but is blind to the danger that he poses.