It's interesting that when Keeley is telling Ted about the implications of that photo of him and her leaking to The Sun, she says "Jamie is going to go mental" but it's not followed up with "he's going to think i cheated on him" or "he's going to break up with me" or "it's going to ruin our relationship" it's instead followed up by, "there's going to be photographers all over us!" And later when she's talking to Rebecca it's, "My god, Jamie would've been so pissed off with reporters poking around in our love life." There's something to be said for like, she never once expresses doubt that Jamie won't hear her out on the truth or believe what she tells him. The major focus of her concern is just keeping their business out of the press. Their relationship in season one is far from perfect but there's a lot of implicit trust between them.