If given a choice she probably doesn't want to be in his group. She doesn't want to be in either group. But BB with its clues, constant nudging, Salman and Gautam Gulati blatantly telling her are forcing her to stay in his group.
This girl will probably have a meltdown and break away from Shukla. BB can't force people to be friends especially when they have to see each other 24/7.
I remember this even in Gautan Gulati's season they forced Pritam and Praneet to stay with Gautam but Praneet couldn't take it anymore and left. And shortly after even Pritam left after his wife's advice.
This time too Asim and Sana will eventually leave.