I can keep looking but did you also notice the ditto marks which make it look like Jennette and Oscar's father was also born in VT?
The 1910 census for Oscar supports his marriage record and lists his mom's birthplace as Michigan. I can try looking for Seavey's in Michigan with a VT connection. There was Seavey family in St Johns Michigan but no VT connection yet.
Maybe I can find something in the Middletown NY papers.