The way Audrey’s growth works in terms of her ability to lift is that, even in her base size, she is able to lift objects and people several times her own size and weight. The rough maximum weight that Audrey could lift at her base size is over one metric ton, or 2,000lbs, meaning she’s able to lift Eden, Kara, and Cassidy with no problem. Renée’s a slight challenge for Audrey to lift at her base size, but is still able to lift her with relatively minimal effort.

Mei on the other hand is another thing. I haven’t exactly nailed down a proper weight for her and her mountainous mammaries, but the common consensus was that each of her breasts were between 2,400-4,800lbs EACH, meaning she’d clock in at approximately 4,800-9,600lbs (~2.5-5 metric tons) altogether.

In order for Audrey to lift all of Mei, and not just one of her breasts, she would have to have engaged in rigorous exercise for two weeks straight, allowing her muscles to swell up farther than what she is as her base size, which dramatically increases the amount of weight she can handle lifting, allowing her to lift the largest lass in all of New Primrose.