WARNING! This article contains SPOILERS for That ’90s Show part 3!Both of Michael Kelsos kids are featured in That 90s Show part 3, with a big argument between the two helping to shed some light on the familys marital drama in the years after That 70s Show. In the series premiere, That 90s Show not only revealed that Jackie and Kelso were married, but also had a teenage son named Jay. This came as somewhat of a surprise, as Kelso had last been seen living in Chicago with Brooke and his daughter Betsy, while Jackie had just begun a romance with Fez in Point Place.
https://screenrant.com/that-90s-show-jay-betsy-fight-kelso-family-drama/