Narzek by Clarissa Lake

Lieutenant Commander Narzek Pardantu’s family was counted among the missing after the Sargan bombed his world to ruin and stole the survivors to make them slaves of the Sargus Empire. With most of his own family still missing, Narzek volunteered for the next mission to search them with half of the Farseek Brigade’s small fleet of ten dreadnaughts. The other half would remain to protect the Farseek system as their homes and infrastructure were being rebuilt.
When he finds his solmatu or soulmate, he uses his rank to have her brought aboard Dreadnaught Ten instead of sending her to the passenger ship with the rest of the rescues.
Then he has to explain it to Cayla Fox, who was abducted from Earth and forced into slavery in the Sargus Empire. As the heat of passion rises between them, so does the danger level of their mission.
Will they survive the mission so they can return to Farseek to have the life they were planning together?