Pre cum scare?

I was sitting on bf lap today both of us naked and I was very wet and grinding on his D but not putting it in just on the outside. I went close to the head of it many times basically rubbing his dick on my pussy but not inserting it inside. He didn't cum but what are the chances of any precum entering?

He ate me out after the grinding and then i gave him a BJ and then we had sex using a condom.

Is there any chance that precum could have come out and then the penetration from the sex pushed it into the vagina???