Do u think I should help my sister to raise her child? she didn't listen to my advices and now is paying?

You should help her because she is your sister. The first thing you need to do is to find an attorney to see about getting child support from this guy even if he did leave the country because that may be possible between some countries. She learned her lesson I think the hard way. You need to get her to go over this site regarding self esteem since that is probably pretty low since this guy did this to her. I am sure she loved this guy so it was a lack of judgment and many people do that.