Yup, and that's good... keep IGNORING him...

when he shows up at your door and says his affair is OVER.. THEN you agree to talk...

This is the boundary we are reccomending... as long as SHE is involved YOU are OUT of there... you have to ACT in a way that reinforces that...

If you SAY that but then accept his emails and convo then he thinks its just a show and he can have BOTH

Keep ignoring him... he will try MORE...

you can get mutual friends to inform him of your boundaries too

"She won't talk to your cheating ass as long as you are in any way in contact with OW... so leave her alone until you have grown UP"

something like that is fine.. as long as YOU aren't the one to say it