It’s not a particularly strong ending but, as this passage is a short series of observations about their relationship, it doesn’t have to be. The next part of the story shows the other characters' reactions to this relationship (while they’re not the narrators of the story, they’ve obviously watched them, too).
In your writing, think of a gentle conclusion to your observation. Maybe Character 2 comes to a stop, like in the Storm Boy snippet. Or maybe there’s a change in the reaction, like the shy cat finally accepting Amelia in the first example below.