They could've gone to a peaceful place for compassionate discussion. A heart to heart amongst the brothers, where they can give him strength with their support.
They could go to - an outing at the park, they could've gone bowling, to the cinema, to a restaurant for a meal and a chat.
Yes they could also have made it into a family affair, which would have been more convicing. Like renting out a movie and having a takeway, which Suhana loves. If Suhana's happy then Ishaan is happy too. Simple!