
He just wanted to get it off his chest so he can't stop carrying the burden of keeping it from his members, ppl he's with most of the time. They listened without interrumping him once and got him to the table to eat some cake together, helping him take his mind off the topic after having to sink back into every feeling he went through back then when opening up.
If Winter really wanted to talk about it, he'd have gone back on topic but it seems he must've wanted to move past it. Also, Winter talking about his trauma had a chill to it but when talking about his hyung turning him down he didn't have such distress, so I guess they sensed it was ok to discuss.

I mean we don't really know that since I took it as a time skip even though short after he confessed to the and then they comforted him and then they had cake. Also they literally all slept in the living room together cause he mentioned having nightmares so they wanted to be there for him. Sometimes you don't need comfort but someone to listen to you and let you get things off your shoulders. They clearly care and love for each other! Esp Winter towards the members. That's why he's been keeping his hard times a secret.
bro they didnt even comfort him when he said his trauma and just eat cakes but when he said someone turned him down, they have a commotion (● ̄(エ) ̄●)