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The use of both Cross and Capstick for Ellen's second marriage would usual suggests divorce from rather than death of the first husband, but here you say Richard Capstick definitely died

Sorry jaywit - a small diversion from your query for anyone who doesn't know this. 
The GRO marriage index, at some times, shows a divorced woman indexed both under her previous married name and her maiden name.
 I don't think that widows are indexed this way at any time, although of course the certificate itself will normally give both names.

The UKBMD indexes https://www.ukbmd.org.uk/
(which don't cover all counties) sometimes show maiden and previous married names for marriages, and also birth registrations, regardless of whether the wife/mother was widowed or divorced.  I don't know what governs whether they are shown or not, but I know  that they aren't always.

There's a Hannah Lowndes baptised 10 June 1804 at Mobberley d/o Samuel and Ann.
Or Hannah Lowndes d/o Martha 7 April 1805 at Mobberley

If your matches have (reasonably) accurate trees which are linked to their DNA result, they should show up in Thrulines. 
(It can be a bit frustrating when you can tell from  someone's tree how they are related to you, but  Thrulines and the common ancestor feature don't work because their tree is unlinked)

I think Caroline is Thomas Wright's wife.  Thomas (being older than Susan) was probably already married by 1841, so the witnesses to Susan's marriage - T. Wright and Caroline Wright would be her brother and s-i-l.

Thomas Wright 24 bachelor s/o William Wright gardener married Caroline Smith 28 widow d/o Francis Saunders at Walthamstow 18 November 1840.  (transcript only - witnesses not included)

Caroline Wright in censuses gives her birthplace as Dunstable, Bedfordshire.  There is a matching baptism of Caroline Saunders d/o Francis and Martha in 1812, and a marriage at Dunstable in 1831 of Caroline Saunders to Thomas Smith.

Thank you so much . Did you find Baptist for my relative Mary Ann ? I have found Susan in 1851 census  living with mum , Ann

Not so far. 
I see that Susan Wright is with Thomas and Caroline in 1841 census.