Playing Sonos and Alexa Devices together\at the same time

Hi there 

I just bought a sonos play one 

I have multiple Alexa devices at home, they are in multiple groups 

If i add the Sonos to any of my groups and play music to that group it comes out of only the Sonos 

How do i resolve this so i can play music out of all speakers in the group 

Speakers are Alexa’s alexa dots and Sonos one Gen 2 speakers 

I simply need to play music to all speakers 

Thanks