Hi Ashley, I can't offer any advice regarding the melanoma-I joined this site because I had a lesion which thankfully turned out to be only "severly atypical" and not melanoma. However I can offer some words regarding the tubal ligation. I had that done myself several years back and ended up with a hysterectomy, for various reasons, after having only one child. I can tell you that I went through a period of mourning for the "children I would not have"; but as time passed, those wounds healed! You are an awesome person for thinking of your husband. Having the tubal ligation is a hard decision! But, as I said, in time you will find peace with your decison and those doubts/sadness about not being able to have more children will fade. I hope things work out for you!
