In stories I see 一起 used to describe a romantic couple being "together", but I would like to understand what it implies.
For example: “……要是我能和她在一起该多好啊！” in this context the boy has just seen a very pretty girl. Does he want to meet her? Date her? Live with her? Marry her? Have sex with her?
Later: “再说，他们俩已经在一起了……怕是不会再嫁给别人了。” in this context, they have been sleeping together, and the speaker clearly means to imply the girl can't be married to anyone else now.
I understand context is always a factor, but I want to understand the more open-ended cases like the first one where characters wish to be or talk about being "在一起" and what sort of relationship is implied.