Funny Thing

I hope everyone will understand the funny thing in what I'm gonna say.

First of all, let me introduce to you the location of an attached bathroom in my house. It has access from 2 rooms, ie, it has got two doors, both at opposite sides. Now, I'm sitting in one of the bedrooms which has an access to that bathroom, OK?

Now, here comes the hero of the story, my Grandma. She goes directly to the opposite bedroom in order to get into the bathroom. But she finds that the bathroom's door is locked from inside. She now comes to my bedroom [ which also has an access to the bathroom], and calls me, and goes into the bathroom through the door from my room. NOTE our position now, we are inside the bathroom where she wanted to get in!, Now she asks me to open the other door [which i said already, was locked from inside] for her. Totally confused, i stood there with a big exclamation mark and even a question mark! NOW, she goes back out of the bathroom through the door from my bedroom, goes around, gets into the other bedroom and gets into the bathroom through the other door which i had opened for her just now!!!!!!!!!!!!!!!!!!!!!!!!!

I hope you understood what the joke was! NO?? OK, then read it once again.