Anubis is credited with many parents.
According to one tradition, he is the son of Re and Nephthys.
The Greek writer Plutarchus, however, names Osiris and Nephthys as Anubis' parents,
whereas in the demotic magical papyrus Anubis' mother is Isis-Sekhmet rather than Nephthys.
Anubis' affiliation with Osiris can probably be explained as an attempt of the Ancient Egyptian priests to explain the relationship between Anubis and Osiris: both were closely associated with death and life after death.
In the earlier tradition of the Coffin Texts Anubis' mother is identified as the cow-goddess Hesat, whose principal cult centre was at Atfih. This tradition survived into the Late Dynastic Period, when Anubis was called "lord of the cattle" because of his affiliation with the cow cult.
In the same tradition of the Coffin Texts, however, the feline goddess Bastet is Anubis' mother.
This is quite likely to derive from the writing of the name Bastet with an unguent jar that was used during mummification
Judge yourself - it`s too late for a paternity test