Okay... if their "step sibling" then that would mean that the two older brothers would be the mother's sons only from her previous marriage while Mc would be the father's son. That'll make them not blood related and the only connection they have would be on paper. But if the brothers have the same father but different mothers then that would make them "half sibling" because they're biologically brothers which make them blood related.

Wait are they basically step siblings (?) They said they're not blood related brothers but at the start the uke said they're his brothers from his dad's previous marriages. But if theyre not blood related does that mean his dad like previously married a widow or something? Im so confused