By his seed....<br />
but that DOESN'T mean you and the children have to accept that.
If he's neglecting this responsibilities, maybe it's time to leave. He is still legally responsible for supporting your kids. <br />
If he won't be a man and take care of it himself ... take him to court. Your kids are entitled to be supported by both parents.
What family has to justify its responsibities... shouldn't it work like... <br />
Legally, I suppose?