Posting here because am genuinely undecided about this. Have 2DSC and 1DC. We’re planning a trip away after Christmas and DH is assuming we’ll split all costs (flights, accommodation, meals out etc) 50:50. Part of me is fine with this — I married a man who already had children and they are my family too. But how do you finance things like this? What’s usual? Fair? DH and I earn roughly the same.