Along the same lines as what blueinbr said, have you ever read Dave Ramsey's books? Dave Ramsey Homepage - daveramsey.com
After understanding is materials, you will be able to set up a budget and live on way less so you don't need to work those weekends.
It could also help your husband pay down his debts quicker.
We started using Dave Ramsey's system 1 1/2 year ago, because my husband took about a 1/3 pay cut, and we weren't sure if we were going to be able to pay all our bills. Not only have we been able to keep up with regular bills, but we have paid about $12,000 in debt! We have about $18,000 to go, and are very excited to be tackling it so quickly.
You are not being selfish not wanting to give up two weekends. You already work hard, and if you need time to decompress, you need to. How many hours a week does your husband work? Does he do all the domestic work while you are gone at your job?
It is nice that you respect your parents. They have wisdom in their years. Definitely listen
to them, but do not do
what they say if after careful consideration you realize you don't want to do it. You are an adult now, with the ability to evaluate all the facts and make in intelligent, responsible decision on your own.