Yes, but with a little teasing beforehand

"I don't know" she says "it would be rather naughty. And I'm not sure if your parents will approve..."

"My mom will agree, I'm sure. Please, Amy...."

She pretend to think for a minute and then says:

"OK, go ask her."

You almost run to your mom.

"Moooom, can Amy stay the night?"

She looks at you with a weird smile and then nods her head.

"Emily" she stops you as you are about to come back to your room "don't be too loud, okay?"

Your face turns crimson and you run away to your room as fast as you can.

"She agreed" you say to Any while catching your breath.

"That's great" she smiles "I called my parents, they also agreed. By the way, we should eat dinner with them or something."

Yesterday you would refuse to even consider this, but today you just say:

"Oh, okay."