Yes, I think so, now that I've been looking at more source material. I now believe Savage's New England Hist. is in error in identifying Ann Foster as the widow of an Abraham Foster. Both Abraham Foster and Andrew Foster apparently died at 90+ yrs of age and lived in close proximity, so Savage probably confused them.
Now I'm wondering of Abraham Foster, s/o Reginald Foster is in any way related to Andrew Foster, husband of Ann Foster, the widow accused of witchcraft, or if these are two entirely different lines of Fosters.