Sorry I havent replied earlier, but I have only just found this post. I havent been doing much research for the last couple of months.
I've actually found out a bit about the Titchener's. However, I have Emma as being 'Married' (cant find an entry tho) to Charles Kates. He was previously married to Rebecca Lofts. He was about 37 years older than Emma. He and his wife Becca were living in the same street as Leonard and family in 1851, Leonard's wife Mary Millard died in 1865. I havent been able to find Leonard on the 1861 census. However, Emma and Charles are together with her younger brother William. They had 5 children between 1858 and 1870. Charles died in 1869, whilst Emma was pregnant.
I have found the marriage entry you referred to, and it states that Emma is a minor. But no father entered. Odd, especially after banns. They are both living in Bread St, but this is the first I have heard of this marriage. Do you have a death for Owen? Were there any children? Could Emma have left him and that is why she was with Charles Kates but not married to him. Not sure about any of this, just maybe's.
How are you descended from her?
I will do some more digging to see what I come up with.
Look forward to hearing from you.