How did this relationship with Astrid come about? Lagertha didn’t just wake up one day and decide to be a lesbian, did she?
Lagertha has been betrayed by so many men throughout her life. Obviously, Ragnar cheated on her and asked her to be a second wife. Her second husband was abusive. Then Kalf, who she groomed to be a leader, tried to usurp her own rule. She had to kill him on their wedding day. So her relationship with men [wasn’t great]. I’m not sure she will ever trust a man again.
So it did make sense that she would find comfort in another human being and that that human being happened to be a woman. I don’t feel that Lagertha necessarily is a lesbian; I never played it that way. But she did find a love with Astrid that men have never been able to give her.