Oh, NLW...I'm so very sorry for your discovery. I know that horrible feeling you had when you saw that d@mn ow's name, confirming your fears that she is back in your husband's life. Big, big hugs to you.
I hope you will stay strong in refusing to sign as a guarantor on anything he asks of you at this time. With everything else you have gone through and are going through, I do NOT want to see this man bring you financial ruin. Please talk to your lawyer immediately and find out what you need to do to protect your ASSets. If in the meantime you have to drive the older car, just remind yourself that life is NOT going to be like this forever and things WILL improve. Do what you have to do to get by for now, and take each day one at a time. You will gain strength over time...I know that.
To answer your question...of course you have your dignity! You are an AMAZING mother to your teenage children and an AMAZING daughter to your aging parents. You also have been an AMAZING wife to your husband and have loved him through some extremely trying moments when other people would have given up and walked away. You are successful in your job. I have no doubt you are a good and faithful friend. You are a beautiful, smart, kind and witty lady. Please do not allow your husband to make you believe otherwise. He is a fool to walk away from you!
I pray you find it easier to detach now that you are aware he is back with ow. That always helped me anyway. When I knew she was in the picture, I was out...no questions asked. Dig deep within and find your strength and grace and continue taking care of yourself and children. Know that you are loved and that you are worthy of love.
And again...I beg you, NLW...please talk to your lawyer and protect yourself financially. If you don't do it for you, do it for your kids.