What will you do if you know your partner is cheating ?

Confront, calmly if possible. Find out what your partner intends to do, make a clean break with e third party or otherwise...

Honestly i would do as the same the abovecomment. But i will think of my actions properly. Afterall i have kids now.

That’s horrible. But forget about the past. Confront him asking what he sees in the future

I'll talk things out with him nicely first. if it don't work out, I'll end things

Confront him before doing anything drastic, dramatic or irreversible.

Leave. Because you don't hurt the people you love. Simple as that

Collect evidence for awhile before confrontation

If i have solid evidence, I will just end it.

Throw all the evidence and leave the partner

I would say to confront him/her about it.