It won't be erased. She will know something happened but can't remember what. It will be traumatizing for her and will be trying hard to remember what happened. Dont find it unrealistic bcoz some forget what happened even after drinking.
Only thing is I hope she gets the support she needs from people around. I'm trusting rey and archit to put their differences for the time. Archit will know she went to visit investor and jugnu can back it up little bit because she knows pranati was thinking of opening a school. and jugnu will be there to support her mom too.
Excited for next episode. Just hope they don't focus too much on vardhan and the evil people in the house who will be busy assassinating pranati's character.