Just looking for births, Ernest Robert and Maria appear as HOTSON, George Henry as HODSON.
Perhaps William's birth was reg as HOTSON (Q4 1860 Caistor)
The only Wm HOTSON marriage in the 1880s was to Harriet

They were together in 1891. I've also looked at HUDSON and HUTSON.
Of course, if Emma and William
were married and she had left him, he may not have felt able to have married Jane. Can anyone spot Emma CUMMINGS in 1891?