There are no relationship points, Manila can be the girlfriend of Michael, Jason or Both.
Surely the mission is asking you to be in relationship with him or 25 + justice.
( If it is the mission that I think it is )Also as far as I remember Jason can also go with Michael.
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There is no mission that cannot be passed, all have options.
And if you can raise your level of justice by editing your save here:
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Also for this type of doubts and future ones you could add an image to help you more.