NOOOOO!
SHE CARES MORE ABOUT HER DUMB CAT GF THAN HER OWN SISTER! THERE MUST BE A GOOD REASON FOR THAT LINE! YANG KNOWS THAT RUBY WILL FORGIVE HER AND SHE IS WORRIED ABOUT BLAKE BECAUSE SHE DOESN'T WANT TO BREAK THE PROMISE SHE MADE AT THE END OF VOLUME 6 AND SINCE SHE IS SEEING REN AND NORA'S RELATIONSHIP DETERIORATE SHE IS LIKELY WORRIED IT WILL HAPPEN WITH HER AND BLAKE. YES.