Weightloss after childbirth is so hard!

I'm struggling to lose this baby weight. I'd like to lose at least 40 pounds (my total weight gain was 60 pounds across three pregnancies) I am a year pp. I am a nutritionist so I'm very aware of weightloss methods and healthy dieting, which my husband tries with me. He had the nerve to lose 20 lbs within 2 months and I lost one. :( I am currently on a calorie deficit. I eat healthy and I have cut out dairy and added sugars and eating less red meat. No alcohol. I don't eat past 8 pm. I exercise at least 5 days a week. This includes the treadmill, stationary bike, cardio workouts and light weight lifting. Yes I'm sleeping. Yes I'm drinking enough water. I don't want to do a keto diet (upsets my stomach) I'm a little stumped, any suggestions?