Active Grandparenting: Ova the line?

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Someone get Leon Kass a drink:

A Japanese woman in her 50s gave birth to her own grandchild last year, using an egg from her daughter and sperm from her son-in-law, a doctor has revealed.

Dr Netsu said the woman had first registered the baby as her own and then the child was adopted by her daughter and son-in-law.

Whole thing here.

More adventures in ova exchange here.