Now when Rey is drunk, and is telling tani's story in front of everyone, how she had her own dreams, and how she fell in love, and then how she made her love her future, sole reason of her existence, and then what the guy did... Tani would be enraged furthermore. Taani may see this as something like through which Rey is bringing their private moments, their things publicly. One doesn't want everything to be shared publicly. And here its not just the dance team but probably other people too. And definitely embarrassing for tani. And she would be really hurt, upset and angry, and it would end up a more angry, rude, adamant rejection, and insulting hurtful things to Rey, leaving him dejected. And probably that's why he would be not able to concentrate on NDC finals, as told by TC articles.