According to a genealogy at Rootsweb's Worldconnect, this William Allen married Freelove Tillinghast. He is of the right age and location to have married her, but I have not yet found any documentation. Wayne G. Tillinghast in his book "The Tillinghasts in America" disputes that, offering evidence that William's wife could not have been Freelove Tillinghast -- at least not the daughter of Joseph Tillinghast.
I suspect that Freelove Allen who married William Remington is a daughter of William & Freelove Allen.
For the time being, I have placed Freelove Allen as a daughter in this family group, pending further research to confirm. These are assumptions only, based on incomplete evidence.
According to research of Wayne G. Tillinghast, William & Freelove Allen were admitted to membership in the Second Baptist Church of Newport on 4 March 1729 ("The Tillinghasts in America, The First Four Generations," RIGS 2006 p 150).