In the Part 1 book this is her listing:
"Mary, b. 28 Feb 1724; living 19 Mar. 1760 (father's will); m. _____ Foster."
This is from the 2016 edition, page 356. So, at least as of 2016 her husband's name was unknown.
She does not have a profile number, so her line is not continued in the next book.