What do you mean by saying lot of marriage?
The Lot of Marriage is an "arabic point" indicating a sensitive point in a given chart that is connected with the subject matter of that Lot; the Lot of Marriage is found by adding the ascendant to the cusp of the 7th house and then subtracting the place of Venus.
In this specific horary chart, I would use the 7th whole sign cusp as the ascendant in the above formula, to represent them (even if they are not legally married the Lot can be used to represent a defacto marriage/marriage-like relationship)
Therefore the Lot here falls @ 27 Virgo:
-it falls in the 10th from the 7th house = + for relationship continuing
-its lord, Mercury, flows away from the Lot = - for relationship
-Venus, generic Love/Marriage significator, is sign conjunct the Lot and flows toward the point of the Lot = +
-Lot's dispositor (Mercury) is in the 12th from the 7th house = -
-Lot's dispositor Mercury flows away from 7th house significator Jupiter = -
-7th house significator Jupiter retrogrades away from the Lot = -
..so using the Lot we have a net -2, indicating that there is a moderate chance that they will indeed end their relationship over the next year or so OR (and this is important) that the fire and love might well have gone out of their relationship during that time even though they could still remain together (their significator Jupiter in that pitted degree in Gemini mentioned in my earlier post)