Ghum has been unpredictable since a long time now. But, my guess would be that it's either going to be a miscarriage due to pakhi's carelessness, the blame might and might not fall on sai. OR... she might get the Child aborted due to her frustration and dissappointed. Her motive of becoming the surrogate was to get closer to virat but virat is simply paying no attention towards her or is spending time with her, taking care of her. So, she might abort the Child. But, might fake a miscarriage, blaming sai or trying to gain sympathy etc.
Now, we'll have to see what happens exactly.