Future Bulma is the mother of Trunks and the ex "wife" of Vegeta, she also made a Sword for Trunks, Videl and Pan. She's Bulma's alt self from alternative timeline
Majin attack[]
Bulma was killed by Dabura which made Trunks mad. After being revived by the Earth's dragon balls, she becomes the mother in law to Mai and the mother of Bulla, she then died of old age, shortly after Gohan died of old age
Goku Black saga (alt timeline)[]
Goku Black killed her in Future Trunks's DBS timeline, 100 years after GT, Future Gohan Black states that Bulma was a nuisance and is glad his "father" killed her