medically/physically you are a great weight. What is the reason for wanting to be bigger? So people will believe you are a mum? So you don't get the 'skinny' comments anymore? What impact does your weight actually have on your daughter and on your mothering abililty? The judgements imposed by others about your weight (ANY judgement based on weight, for that matter) and who you are as a person are shallow. Not only that, but a lot of judgement based on weight is a projection of their weight own issues and ideals. What are your weight ideals? What would being larger mean to YOU?

Your ideal weight range is 54-67kg, it sounds like a maintenance 'diet' is what you need really. I can give you some links, but first I'm interested to know WHY you're doing this.
Medically I am 'okay' in terms of my weight. I want to be a bit more bigger because I want people to stop making skinny comments. Skinny comments are beginning to make me feel and think I am skinny. The skinny remarks are making me want to stay indoors. Staying indoors makes me feel comfortable and I know I will not be judged or hear any further comments regarding my weight. When we do go out, I have to ask my DH 10 times whether I look skinny or not. Of course, I want to look like a mother and not a slim 22 year old girl with a baby.

The judgements imposed by others about your weight (ANY judgement based on weight, for that matter) and who you are as a person are shallow.
I understand that. But I am not interested in changing their shallow behaviour or characteristics but rather make them stop from making such comments and the only way I can do that is to gain weight and shut them up. Also, gaining weight for me means I can be more comfortable in my body when I am out and less worried about who will say what.