Soumya was not even able to stand but she got all her will power strong and somehow gathered strength to walk but was not able to then Harman hold her hand when she was about to fall but then also when it come her turn to do all promise because Ihave seen in other serial that in first four phere husband make promises and in last three phere bride make promise but when it came her turn she totally became weak and hot unconscious so in that time Harman too her in her lap and took all phere
And even soumya left Harman hand
So it kind of totally symbolised that the poison of world will make soumya totally weak even she will try to gather strength for herself against world to stand up she would be not able to unless harman would hold her hand it also would be not enough she will leave even his hand and will totally loose everything then also Harman will forcefully become her shakti and will stand in front of her and protect her against whole world
I think that's why this is poison drama was there as it has nothing to do with truth
It was show their journey of marriage