Elizabeth may or may not have had a former spouse, but my guess is she did and that she either married very young the first time or is fibbing about her age now (as widows are very much inclined to do).

1.  Anon.  1966.  Marriage Index:  Ohio, 1789-1850.  Liahona Research, Orem, UT (Broderbund CD-400):

Morehart, Washington

Briner, Elizabeth

Mar 7, 1839

Hancock Co.

2.  1840 Census Index and Digital Images (online at Ancestry.com; Image #2-3 of 6; extracted by Diana Gale Matthiesen):

1840

OH

Hancock Co.

Amanda Twp.

pp. 50A-50B

Washington Morehart

000 110 - 101 010

0200000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	15-19	1820-1825	= step-son?
1 male	20-29	1810-1820	= Washington (b. 1817/8)
1 female	4 or under	1835-1840	= Daughter A
1 female	10-14	1825-1830	= step-daughter?
1 female	20-29	1810-1820	= Elizabeth (b. 1810/1)
2	persons engaged in agriculture

The two teen-agers may be Elizabeth's children from a former marriage, which may also mean Elizabeth is lying about her age.  Listed next to David MOREHART. 

3.  Family Quest Archives:  Ohio Federal Census 1850: Hancock and Hardin Counties.  Heritage Quest CD M432-692:  Amanda Twp., Dist. 48, Hancock Co., OH, p. 466B, 90/90, enumerated 7 Sep 1850 (extracted by Diana Gale Matthiesen):

Washington Morehart	32	m	farmer	1600
Elisabeth	39	f
Melinda	10	f
Cephretina	8	f
John	7	m
Caroline	6	f

Blanks in the birthplace column appear to mean Ohio.  Listed next to Cristina (MOREHART) KERSHNER.

4.  Family Quest Archives:  Ohio Federal Census 1860:  Hancock County.  Heritage Quest CD M653-982:  Amanda Twp., Hancock Co., OH, p. 203A, 97/93, enumerated 4 Jun 1860 (extracted by Diana Gale Matthiesen):

Washington Morehart	43	M	Farmer	4000	9000	O
Elizabeth     "	42	F				"
Christy Ann   "	20	F	Servant			"
Caroline      "	16	F	"			"
Wm Henry Treon	6	M				"
Christena Crisher	72	F				Pa

Christina (MOREHART) CRISHER is supposedly Washington's aunt.  Christina should be 62, not 72.

5.  1870 Census Images (online at Ancestry.com; Image #18 of 38):  Vanlue P.O., Amanda Twp., Hancock Co., OH, p. 22B, PN 18, 126/126, 28 Jun 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

Morehart Washington	52	M	W	Farmer	3800	1937	Ohio
________ Elizabeth	57	F	W				Do
Treece Wm H	17	M	W				Do
Morehart Christena	75	F	W				Pa

William is Washington's nephew.  Listed next to Josiah MOREHART.

6.  1880 Census Images (online at Ancestry.com; Image #1 of 31):  Village of Vanlue, Amanda Twp., Hancock Co., OH, p. 493A, PN 1, SD 1, ED 184, enumerated 1 Jun 1880, official enumeration date 1 Jun 1880 (extracted by Diana Gale Matthiesen):

1880:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

1

2

3

4

5

6

8

9

10

13

24

25

26

8

8

Morehart Wash

W

M

63

/

Retired Farmer

O

O

Pa

________ Elisabeth

W

F

62

Wife

/

Keeping House

O

Pa

Pa

Treece William

W

M

27

Nephew

/

Laborer

O

O

O

Lee Custa

W

F

19

Niece

/

Servant

O

O

O

7.  1900 Census Index/Microfilm (online at Genealogy.com):  861 Wilson, Findlay City, Ward 5, Findlay Twp., Hancock Co., OH, p. 206B, SN 17, SD 7, ED 62, enumerated 14 Jun 1900, official enumeration date 1 Jun 1900 (extracted by Diana Gale Matthiesen):

1900:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	19	22	23	24	25	26	27
384	387	Thompson, William	Head	W	M	Mar 1855	45	M	18			OH	VA	PA	Plumber	Y	Y	Y	O	F	H
		________, Catherine	Wife	W	F	Jan 1859	41	M	18	0	0	OH	OH	OH		Y	Y	Y
		Morehart, Hester	Mother in law	W	F	Apr 1833	67	Wd				OH	PA	PA		Y	Y	Y

Apparently, Washington is deceased.  Catherine is Hester's daughter from an earlier marriage.

8.  Nancy Straub Holben.  The Chrisman -- Holmes -- Straub & Welch Family Genealogy.  FamilyTreeMaker User Home Page.

9.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).