You decide to take a third option.

After letting Ava in you take a chance to check her out nice ass while she isnt looking and checking out your (Luna's) hot busty body,you decide you want try to merge both Luna and Ava's bodys together. While Ava has her attention else where you quickly strip Luna's body until you are only in your (Luna's) bra and panties then you quickly run up to Ava push yourself into her and start hugging her tightly.

With a startled scream. She yells"Luna whats gotten into you all of a sudden!" Suddenly your (Luna's) legs start to merge with Ava's. Ava looks down with horror as she sees her legs merge with yours and soon both of your entire lower bodys had completely merged,In terror Ava begs you."Please stop this Luna,we're friends arent we. Im begging you, stop!" You ignore her as your chest starts merging into hers and as it does so you can see Ava's breasts growing larger the more of your chest merges with hers.

Soon after that your arms start merging with hers. Ava still putting up a futile fight. And after your arms and chest have finished merging you take your fully merged arms and use them to push your(Luna's) head into Ava's to speed up the merging process. With one last scream Ava's head completely merged with yours. At that moment you gained access to all of both Luna's and Ava's memories.

You also realized that you were wearing Ava's clothes though the shirt was a quite bit tighter because of your 'enhanced' assets. You peaked into your cleavage and realized that even your(Luna's)bra and panties had merged with Ava's.You then proceeded back up to Luna's bedroom and check out the merged beauty that you now were. After getting to a mirror the first thing that stood out was your eyes. Your right was one of Luna's blue eyes while your left was one of Ava's amber eyes. Your hair was Luna's length and its was Luna's natural black with strips of Ava's dyed red hair going though out. You had Luna's D-Cup breasts but they were as soft as Ava's breasts. You also had Ava's large and firm ass and your legs were long and smooth,and your skin was smooth and soft as well. Are you able to explore your fused body or are you interrupted again?