Reservation sleeping compartment as couple in night train Hamburg-Stockholm

Hello,

I would like to make a reservation for a sleeping compartment for a couple (male and female) in the SJ night train from Hamburg to Stockholm.

Following instructions from a previous topic discussion, I manage to add my Interrail number pass through SJ company booking website, but I can either : 

1. Book “bed in sleeping compartment” and have to choose between Men or Women compartment for 1,660 SEK (Interrail fare)
2. Book “private sleeping compartment” for 3,710 SEK (it looks that the Interrail fare doesn’t apply)

By selecting OPTION 1, can my partner and I be in the same compartment or does it mean I have to book a private compartment (without Interrail fare) for my partner and I to be in a gender-mixed cabin ? 

Thank you for your help !