SAHM, I'd say with 44 lbs to lose that you can probably expect to lose at least 4 lbs this month. As you get closer to your goal, that might change, but I'd aim for anywhere from 3 lbs to 5 lbs for your monthly goal. I can tell you from my experience that it feels amazing to lose more than your monthly goal, but devastating when you lose less, so I'd go for a lower number than you think.
The monthly goals have really helped me stay on track...I hope they help you too! Your twins are darling, BTW!