If we have a romantic spark and connection is that illegal?
No, it is not illegal to have a romantic connection with a companion.
Anything that may or may not happen is a matter of personal choice and personal preference between two or more consenting adults of a legal age, and is not contracted for, nor is requested to be contracted for, or compensated for in any manner. Again, I do not sell sexual favors I will sell time and companionship. Such as your lawyer who sells their time and legal knowledge.