你只有正式adopt 继子， 才彻底没有生父（母）什么事，在英国是这样的：

If granted, the adoption court order gives you parental responsibility for the child - along with your spouse or partner.

The order also takes away parental responsibility from:

- the child’s other birth parent
- anyone else who has parental responsibility for the child

An adoption order cancels any other type of court order, eg how, and when, the child’s birth parent can visit the child.

www.gov.uk/child-adoption/adopting-a-stepchild