should I get back with my ex Husband?

My ex Husband cheated on me. We got divorced4 years back. We have 2 kids. Twin boys aged 3. Anyway about 2 years back we both remarried, him with the woman he cheated on me with and then both of us ended up divorce again. Compatibility issues. Anyway, Long story short we started dating each other again about 7 months ago. And now he has proposed to me again. It feels right and the kids ofcourse are excited. We are both 35. Any advice? What would you do if you were in my shoes? Everything seems great but I am wary with drinking from the same glass twice. But I also know it would be good for the kids to grow up with both Mum and dad.