Although Number One didn't have a lot of golden liquid saved up, it would still be enough to provide Luna with some safety net for her Soul. He couldn't bring out the whole bowl so he simply filled a small vial and brought it out for Luna to taste.
"You can drink this liquid first. It is not much but it will strengthen your Soul and you might even break through," Number One introduced as he presented Luna with the vial. "I actually used it exclusively to reach the Soul King rank. It doesn't work on me anymore so don't worry about taking it."
Number One didn't want Luna to think that she was indebted to him since all of that didn't matter anymore. They were already a team and she was his woman. He benefited whenever she got stronger as their overall power increased.
"Thank you," Luna acknowledged sincerely and kissed him while pulling Number One to sit on the bed. "Can you hug me while I cultivate? I will feel much safer in your arms."