This could be fun to be honest. But we don't know anything for sure until we see something in the coming chapters. For all we know, it just ended with the kiss and nothing more. By not depicting it on paper, there's room to doubt and change the story in the future after all. If sex did happen...
I hope ch 51 raws come out soon because I want to know about Tsubasa's morning after. Nothing's really set in stone unless it's been spelled out this manga.
Chapter 50 is out in a non-english language. I used google translate and it’s not great for Tsubasa shippers sadly. In fact, it might have torpedoed it