Final answer:
Without additional context, it is not possible to determine the truthfulness of Regina and Kendra's personal agreement. An open relationship allows for outside sexual encounters, but such arrangements are unique to each couple.
Step-by-step explanation:
The information provided does not allow for a definitive true or false answer as it pertains to a specific arrangement between Regina and Kendra. In order to determine the truthfulness of the statement, more context or direct knowledge about their personal agreement would be required. Generally, in some relationships, partners may agree to pursue sexual encounters outside of their committed relationship, a concept known as an open relationship. However, this is highly individualistic and cannot be assumed without explicit confirmation from the parties involved.