Please help me save my marriage!

I know I should discuss this with my husband first but I don’t think he understands because the issues that I am having with is his sister. I hope you guys will help me solve this issue. I just don’t want to share my game with my obnoxious sister-in-law. 

I have been playing this game for some time now and I have been investing my time and money into it and she comes to stay with us for the holidays and ruins it for me. 

What happened was she and her kids joined us for the holidays since it’s the season to be together as family and I really thought she was here to make my life easier but no! 

Since she was getting bored and thinking of her as my own sister, I introduced her to the game so that her time flies and she started enjoying it. I was glad, now that she is playing the game, she will create her own profile and we become game buddies.Next thing you know, she kept playing it for 15-16 days and you know, being the sweet person that I am, I let her.

Now that it’s time for her to go back, she WANTS my game to be transferred to her game profile so that she can continue. How can she say just take away MY GAME?! I know she has played the game from Level 50 to 68 but that does not mean she just takes it away right? I have put my efforts into it. 

She keeps saying that she has put in her time, effort and money into my game and I tell you that’s NOT MY PROBLEM. I had introduced it to her but she could have downloaded the game in to her phone. I clearly said no to her and asked her to get out of my house. And she informed this to be my husband, her brother. He is angry with me now.

Please help me guys. I know she spent her money but I did not tell her to. I have been doing that and I will continue to invest my time and money into Star Chef 2 but sharing? A big NO! Please advise.