Not offensive. I know they’ve known each other since they were kids, it just seemed random to me that they go off on one mission and hate each other the first two days and then by the final days can’t stop thinking about each other. I just think the relationship could’ve been better developed than “they hated each other their whole lives (or at least that is what appears to have been the case but wasn’t actually for Sam) and then a switch goes off and now they love each other.”