Even if Monique wanted to, she wouldn't be able to give a kidney to Aster either. I'm very familiar with (mostly peritoneal) dialysis and transplants and even if she gets one directly from a relative, she still has to go through the common sense steps so she doesn't kill herself and waste a kidney.
There is absolutely no way she will regularly attend for haemodialysis, 0% they'll find her suitable for at home peritoneal, won't take her meds, won't lose weight, won't go on a low sodium and potassium diet and lastly, her urethra just seems to be a permanently festering tube of bacterial so that rules it out too.
She's gonna be miserable until she dies.