I’m trying to build a family tree in Notion. It seems that /mermaid is a good solution for graphs. However, the lines in mermaid are curves rather than strait lines. And the lines are directly pointed to the next generations. What I want is something like

Father           Mother
  |                |
  └────────┬───────┘
           |
  ┌────────┼───────┐
  |        |       |
 Son1   Daughter  Son2

Can anyone help with a easy and clear solution?