Does anyone have any ideas what would have happened to a husband surplus to requirements in the 1880s?

My great great grandmother 'Susan/Susannah McGlave' had a son in 1886 called John McGlave with no father listed on his birth certificate however she seems also to have been married in 1883 to a Samuel Morris in Heworth. I don't have a copy of the certificate but she has an uncommon name and on the IGI records her fathers name of James is given so I'm positive its her.
Just wondered what she might have done with Samuel as I couldn't find a death for him and she then got married again in 1889.
Was it possible just to lie and get married again if husband number one was still alive or would the patio have been an option?