Thats 100% not true. you see in the episode the blood moon ball , it shines down on two people and selects to the two binding their souls for eternity

Star and Marco danced when the moon shined on them which mean their soul's are binded.

In the bon bon episode when the moon showed up it was there to alarm Marco that Star is in danger.

Why do you think Marco stopped kissing Jackie. Cause he was reminded of star notice how he went straight to his phone to see missed calls from her