You are running the dasa of Venus, lord of 2nd and 7th houses (both maraka sthanas). In Navamsa, Venus is placed in the 8th from Navamsa Lagna but in the 12th from Natal Lagna – both being undesired placements.
Your wife is running Jupiter dasa. Jupiter is the lord of 2nd and 5th houses, one of which is a maraka sthana. In Navamsa, Jupiter is placed in the 4th from Navamsa Lagna but in the 8th from Natal lagna.
For both it is not a good period. However, no serious marriage break is seen.
Does your conflict relate to children? or is another member of the family the cause of conflict?
Performing a Uma-Maheshwara puja together with your wife is suggested.