I think in future family members will blame M For the condition of ds and some random doctor will say that if ds recieve any shock she would die and to save her life it is necessary to keep her happy and at the same time uv will warn M to marry him or loose her property , property would not be a big deal for M but it could be a shock for ds so for the sake of ds's life M will mary uv. And then ds will become healthy because it is her master plan.and then pakash will return.