After completing Jaal Ama Darav: Flesh and Blood and Hunting the Archon there is an email from Jaal titled "Meet My True Mother" inviting Ryder to meet Saluna the next time they are on Havarl. Acknowledge it to start the mission.
Accompany Jaal to HavarlEdit
Take the shuttle to his childhood home, and meet his mother and numerous siblings. Then he shows his room, a kett weapon, and an star map lightening up the room.
If you have flirted with him before, you now have an opportunity to deepen the relationship.