"Well since they both chose to move in with me I think we should let them stay. We can always change our minds later." You replied.
"Ok, I better let them out then, they won't last much longer in there with all the movement they are doing." Your mother replied.
You lead her to the bathroom and she took off her dress revealing that she was wearing nothing underneath. You look at her well-aged body, large but slightly saggy breasts and untrimmed pubic hair, the large round pregnant body.
She lay down in the bath and started to strain. Through heavy breaths, she slowly pushed out your sisters in all their naked glory. They came out together in a 69 position and were clearly enjoying each other. You had stripped bare too and were slowly stroking yourself to this spectacle.
Your mother squirted and let out a cry as Alex's head and Emily's hips popped out of her vagina. She squirted all over her daughters as Emily's feet slipped out.
You couldn't hold yourself back any longer and cum over all of them.