I'm not a doctor nor I play on on TV but I don't think her legs are going to be the direct problem for her eventually becoming immobile. A lot of the people from My 600 Pound Life where their legs are the issue is usually because of lypmh issues having them retain water in ther legs to where they become so swollen that moving them is problematic. From the few times that Amber has shown her body, she does had giant legs but she gains a lot of her weight in her torso and her shelf ass. And unlike the TV people whose legs are usually so gross with growths and sores and lesions, she still wears pants. So I do absolutely believe that she's gonna be bed bound but I think the cause will be that she physically won't be able to carry her weight before her legs getting too swollen to move them.
I think her immobility will predominantly be due to her legs and related joints. Lymphedema and lipedema both cause mild to severe pain that is either constant or occurs when pressure is applied, such as supporting and balancing a 550lb mass. The feet and knees suffer the most from disproportionately distributed upper weight, supporting more weight than the connective muscles can handle, and worst of all, her swooping gait. If her weight isn't already compressing her knee, hip and ankle joints, it soon will, because as a post-menopausal girlypop, arthritis and osteoarthritis just around the corner. And if she continues with the GLP-1 she may develop osteoporosis as well. At some point, the pain in her knees, ankles, and swole lymphedema will become more frequent and unbearable with walking, but less so if she stays in bed — and guess who loves to waddle the route of least resistance. If she gets this bingo combo, she will have plenty of reasons to stay in bed, fear of falling and shattering her skeleton being the one I'm betting she'll lean on most.
she gains a lot of her weight in her torso and her shelf ass
I reckon that's static fat and has been there a long time. She is mostly gaining now in her face/neck, her upper arms, her liver boobs, and her legs. Not to mention, we do not know the extent of her leg/ankle lymphedema growth over the past few years because of how baggy those pants are, but it's reasonable to assume they have grown considerably, as she has either maintained or worsened the same lifestyle habits that caused the issue in the first place.
I wonder, once this whole OKC arc is over (either by moving away or death), if Methmomma will look back and reflect upon this time. Do you think she will have positive memories of reuniting with her daughter? So far it seems ok but Amber is getting less self-reliable by the day and it seems like someone is gonna have to step up to the plate and help the fat bitch.
Mamalynn is not coming to the rescue. The chances that she found a fiance in OK who is in the same generation as her, who is not narcissistic, financially abusive, or controlling, is near to zero (the fact that he even accepted amber's Bingo money does not bode well). Mamalynn spent most of her adult life either in jail or getting high rather than learning how to pick a healthy, emotionally available and mature partner from a toxic one. In short, mom's fiance will block the caretaker storyline to protect his peace and because he doesn't actually give a shit about Amber. In fact, I'm sure he thinks things were much simpler before she moved to OK and will be glad to be rid of her, whether by car or casket.