To adopt her you have to own a House with a Child's Bedroom and have not have adopted more than 1 other child in Whiterun yet. You can find her walking around town or inside the Temple.

To install just copy the esp into you data folder or use a Mod Manger to enable or install it.

To remove just delete the esp

As far as I can tell she does move into your house and stays there as your Daughter. I don't know if Ahlam has a quest specific to her Character or not but I had not encountered any involving her as she normally has no dialog with the Player. Still I advise you to use at your own risk for now and if it breaks your game be sure to contact me.

Tested with SkyrimLE, but should work for oldrim with the Hearthfire DLC.

Note I know she doesn't look like her Adult self but Vanilla Children of Skyrim have very few defaults so I used the one I liked best for her as I am too lazy to make a custom Child. It took long enough to figure out how to make her Adoptable.

Disclaimer
This is the Initial Version sometimes called Alpha, not Beta, use at your own risk.
I am not responsible for damage to your computer, your save files, your Character or the loss of them.
Currently there are no known bugs caused by these files, but this has not been fully tested.