Diabetic Autonomic Neuropathy: Given the patient's long-standing type 3 diabetes and the use of multiple medications to manage it, diabetic autonomic neuropathy is a plausible cause. This condition can affect the autonomic nerves controlling bowel movements, leading to intermittent incontinence of stools, especially at night.

Gastroparesis: Another complication of diabetes, gastroparesis involves delayed stomach emptying, which can lead to unpredictable bowel movements and incontinence.
Medication Side Effects: Certain medications, such as metformin, can cause gastrointestinal side effects, including diarrhea, which might contribute to incontinence.
Alcohol-Induced Diarrhea: Regular consumption of wine could potentially irritate the bowel, leading to diarrhea and incontinence, especially at night.

Colorectal Cancer: Although less likely, it's crucial not to miss colorectal cancer, as it can cause changes in bowel habits, including incontinence. The patient's age increases the risk.
Infectious Colitis: Infections like Clostridioides difficile (C. diff) can cause severe diarrhea and incontinence. Given the patient's age and potential for antibiotic use (not specified but possible), this is a critical diagnosis not to miss.
Neurological Disorders (e.g., Multiple System Atrophy): Conditions affecting the central nervous system can lead to autonomic dysfunction, including bowel incontinence.

Amyloidosis: A rare condition where abnormal proteins (amyloid) accumulate in various organs, including the nerves, potentially leading to autonomic neuropathy and bowel incontinence.
Vitamin Deficiency (e.g., Vitamin B12 Deficiency): Can cause neurological symptoms, including autonomic dysfunction leading to bowel incontinence, though this would be less common in the context provided.