How did the bhoot enter the house if she is not a actual bhoot

How come masi said she was not a bhoot how she knows
Was she actually a bhoot or someone trying
To scare them
And where did she go doesn't maya have sense
Tht she can go out from the windows
She said Maine bnd kr diya tha usse kahan gyi
And also how did the bhoot enter the house like tht where
Were the guards and house doors were open