This is not a sad story really, being single i always say if someone shows you their true colors, believe them.
1. No woman, who loves the husband, loves her children will walk away from her matrimonial home just like that.
2. These two people got married when they were both desperate.
3. The two seem to have gotten married for the wrong reasons, if they were in sync, were in love, money would not be an issue, women make homes, they are the ones who strive to save money so the suggestion to make savings here and there would be the woman's, assuming you have not left some details out, this mama was in it for the money, someone else is providing the money or promised to.
4. Men, just like women never learn.
5.Marry someone for who they are, not what they have.
6. Marry a stable woman, someone who has her own identity, someone independent na shida zenu hazitakuwa pesa, am being an idealist here, reality is most people dont get married, they find themselves in it.
Ask your neighbour to go find a woman and put in that house, alafu anyamaze.
Let him pay fees for the kids, nothing else.