You both stops her and explain the situation

Your girlfriend/Mrs. Bradley grabs Claire before she can make for the door and your girlfriend shudders and shifts. Her fit MILF form shrinks leaving her clothes loose and her red lustrous hair becomes dirty blonde again leaving your girlfriend standing in Mrs. Bradley’s half filled clothes.

"M...mom? Jane? Oh hell no..." Claire signs as she sees her shapeshifting bestie reveals that she was her mom for the whole time.

"Claire, I know you're shocking that I bang my boyfriend in your mom form, we were trying to do something kinky. I know, what you just saw is absolutely insane and I’m gonna sound crazy, but I'm so sorry for turning into your mom without your permission." Jane says attempting to calm down her friend.

"Jane, I forgive you for turning into my mom without my permission, but what I just hate that you don't invite me to have a threesome." Claire says as she's a bit upset hesitantly rising to her feet.

"Wait the minutes, Claire. You know about this." you ask as you raise your eyebrow.

"Yes, honey. She known about my secret, and not just her. All of my girls also know about my secret." your girlfriend explains.

"Oh I see, I never knew you told the girls about your secret, Jane." you respond.

"I'm sorry that I forgot to tell you, John. And I'm sorry that I forgot to invite you and the girls to come over to have some fun, so can you just forgive your bestie, please?" your girlfriend asks as she makes a cute innocent puppy eyes.

"Alright, girl. I forgive you for this, but you owe me." Claire replies as she forgives her bestie and then give Claire a hug. "Anyway, can you two put some clothes on before somebody get home, I don't want to see you both naked at my home."

"Roger that." you both reply as you and your girlfriend quickly put your clothes on as quickly as possible. Finally, all of your clothes are back on, Claire, Jane, and you head out of her parents' bedroom without get any suspicious. After that, the three of you go to her living room and Claire breaks her silence. "Well, that was easy."

"Yeah." you respond.

"Well, anyway now that we're in the living room, what do you think we should do next?" your girlfriend asks