Debra
You said " My reason for exploring this is that it may be possible that 1 of Vera’s sons may be Lilian’s father.."

Vera was 2 years old when Lillian was born. They were cousins
Dave

PS Great find Sally. Definitely the right family.

Vera Bennett, baptised 7 October 1908 at Christ Church, Heeley, Sheffield.
Parents, Joseph and Harriet of 36 Gregory Road, Sheffield.

In 1911, the family are living at 48 Sherrington Rd, Sheffield. (Sharrow Ward).

Found the family too on the 1911 census but there was no older sister called Alice.

I think we need the definite article on who Mr Robinson knows is 100% and thenstart working back because I think at the moment it looks like we could be going down the wrong path.