It's nice that you care and want to do the right thing. However, your wife is the one that is choosing divorce and it's not like you abused her or cheated on her. Her choice will have consequences and she will need to fend for herself. Think of it this way, she is walking away from the lifestyle you provided for her, HER CHOICE.

If you are ordered to pay alimoney, as others have mentioned go for none or the lowest amount. She probably will be entitled to half of the home you both have, whatever equity is there in that home. Given there are no dependent children she can't claim she needs the home for the children.

You still embrace the habit of taking care of her, well, she has chosen to end that relationship. This means you are free from having to take care of her, always remember HER CHOICE.