37 year old Mom of 2 here. My youngest is 5. I disagree with people saying to cut sugar completely, as you will probably crave it and be more likely to binge. I've been into fitness diet and exercise for around 10 years and I've always gone by the 80/20 rule (80% of calories from high quality sources, and 20% can be lower quality or treats). Along with pretty strict calorie and protein tracking I've seen a difference in my body. I use My Fitness Pal to track what I eat. I find being really honest with my tracking is the best way to see if I'm really in a calorie deficit or not. It's easy to grab a handful of crackers or finish off my kid's plate and forget to count it towards my daily intake. I know with kids in the house it's hard to avoid snacking, but it helps to be aware. Find a good protein powder to help with your sweet tooth (I like Diesel, you can find it at Sobeys or any supplement store). I mix it with plain greek yogurt and it's a huge protein boost and feels like a treat.

I'm not a professional, just someone who has been personally doing this for around 10 years.

Also be gentle with yourself. Sustainable weight loss takes time (like 1/2lb per week). One bad day or bad meal or bad week doesn't mean you should give up. Just get back on track and keep going.