They match perfect for a mother/daughter-roleplay like in their highly recommended PerverseFamily series. The chemistry between them is fantastic, they go to the limit. It´s a shame, they did no LP scene together yet. It´s about time to change that!
The approach should not be less than shooting the most kinky porn scene ever - best in a story-based trilogy as once the famous "Clockwork Gang". (By the way: Story ideas welcome. Be creative and post your suggestions. Probably I will write down mine within the next days.)
If it´s up to me, the scene(s) should include everything imaginable as crazy as it can get:
Merciless endless ballsdeep asshammering (also in prone-bone which - strangely enough - I´ve never seen with Anna), rough manhandling & womanhandling, deepthroat facefucking, spitting, dirty talking, fisting & foot games, tonguedeep rimming, rosebud licking, jizzed on and pissed on while still fucking, lots of interaction between Anna and Brittany, intense kissing and cumswapping and all the other good stuff.

Make it happen and shoot the best selling scene ever.
Just do it!