The split comes as Scott continues to give away her fortune at a rapid pace, showering nonprofits and other institutions with in no-strings-attached cash.
When she divorced Jeff Bezos she received a quarter of his Amazon stake, then worth $36 billion, and has since given away at least $12.7 billion.
Jewett’s name has been removed from public documents related to Scott’s philanthropy work.
Jewett previously taught chemistry at a private school in Seattle attended by Scott’s children where the pair met.