In the 1851 census I found a John and Susannah Adams living in Coleshill. I can't quite make out his place of birth, but Susannah was born in Birmingham. He is a shoemaker aged 51, and she is a shoe binder aged 50.
Due to the age discrepancy this does not look like your Susannah.
There is an 80 year old widow Susannah Adams, proprietor of houses b Sawbridge Warwickshire - i don't think this is your Susannah either.
Other Susannah Adams on the 1851 census who were b Warwickshire are even more wrong than the above two. I don't think any of them match up with the 1841 John and Susannah Adams living in Coventry (this John is some kind of labourer aged "65").
Both may have died before 1851, which is a shame.
Have you double checked to see if the marriage between Susannah Beasley and John Adams in 1833, is the correct Susannah? Do you have a copy of the marriage entry? Is an occupation or abode noted?