Marriage (Same Sex Couples) Bill

On that issue, the situation is surely this: there is no compulsion, and if any couple, be they carers or siblings, were minded to consider that new relationship, they would surely sit down and work out what could be a major downside. They would no doubt take professional advice to see what the advantages and the disadvantages were, and if the disadvantages of that relationship far outweighed the advantages, they would not proceed. It is as simple as that: there is no compulsion.