I am concerned that this question may be inappropriate to the Stack Exchange, because it asks for Wesleyan ethics, even though it is known that people can reason differently in ethical decision-making. Also, as the Wesleyan Quadrilateral holds Reason, it is assumed that Reason is used in biblical hermeneutics and ethics. So, hypothetically, two Wesleyans can reason differently and both claim that they are derived from Wesleyan thought. What to do in this case? Do we allow ethical questions?
(The reason I hold the opinion that it is an ethical question is that the description seems to ask for what qualifies or not qualifies as a "Wesleyan marriage", as if somehow the Wesleyan marriage is different from other types of Christian marriages. Wouldn't rejecting a marriage as valid contribute to Wesleyan ethics, that is, how should the Christian behave in the world based on his/her understanding of what God wants?)