If you and Mark live together for ten years then split up then one of you might have a (financial) claim on the other.
The nature of the claim would depend how much the richer had benefited, or the poorer lost out, due to the poorer's contributions to the relationship on the needs and obligations of both of you, on any children involved, etc.
It's recommended that it be possible to opt out of this by mutual agreement, though a court would be entitled to ignore that if the result was "manifestly unfair" (plus some other conditions).
no subject
If you and Mark live together for ten years then split up then one of you might have a (financial) claim on the other.
The nature of the claim would depend how much the richer had benefited, or the poorer lost out, due to the poorer's contributions to the relationship on the needs and obligations of both of you, on any children involved, etc.
It's recommended that it be possible to opt out of this by mutual agreement, though a court would be entitled to ignore that if the result was "manifestly unfair" (plus some other conditions).