AND BEFORE YOU SAY IT NO DO NOT REFERENCE TEAM FOUR STAR'S DBZ ABRIDGED SERIES INFACT I'LL POST IT BEFORE YOU!
Alright than.
To this day I still don't know how they end up together despite the revelation from Trunks. I mean for Goku and Chi Chi we see them get married at the very final episode of Dragon Ball and a lot of build up and development lead up to it.
Here they timeskipped it for Bulma and Vegeta. We don't even get to see Trunks being born.