An article in The Guardian :

http://www.guardian.co.uk/uk/2013/apr/28/girl-forced-pregnant-donor-semen

From the article:

The mother, described as “highly articulate”, and who “loves the children and they undoubtedly love her”, had isolated the family. The children were schooled at home, and the adoptive father of the eldest two was deliberately excluded, did not know where they lived and had not seen them for 10 years. Neighbours and social services were kept at bay.

It hardly needs saying that no father would be permitted by social services to isolate the family, exclude the mother etc. After all, mother knows best…