My mom and I (FI has chosen not to be interested

) are at the point of ordering invitations. We've found the ones we all like and are now trying to figure out wording. Here's the tricky part:
My parents are at the very tail end of a divorce (it may have been finalized in the last month or so, my parents don't care to update us) and my mother has decided to take back her married name. Her name hasn't switched yet and I've asked my mom if by the wedding it'll have changed, and she shies away from the subject. SO originally for divorced parents hosting a wedding, I think the wording goes:
Mr. John Smith and
Ms. Jane Smith
Reguest the honour...
Would it be awkward looking if her name's changed (and would it cause controversy within family) if it's worded
Mr. John Smith and
Ms. Jane Walker
Request the honour... ?
Our concern is that it may appear to, for people who don't know my parents/our family (FI's family friends) be my dad and his GF hosting the wedding rather than my mother. Thus being said, my mom was thinking to just do:
The parents of Kate Smith request the honour of your presence... but I can't figure out how the rest of the invite would read without being repetitive? Especially for formal invitations.
What do you think would be least confusing and proper? We don't want to change it to "Together with their parents" because we're all VERY traditional and my parents are paying for and fully assisting in the planning of the entire wedding so it's important to us they have acknowledgment of hosting the day. Any and all ideas are appreciated!!