I'm sorry for you, honey, but trust me on this - emailing this woman will only add to your hurt, not relieve it.
She knows full well what she's doing; she knows he's married to you, she knew you were pregnant when she first took up with him and of course she knows you have dc together - but she doesn't give a damn.
If you seriously think that you can in any way prick this woman's conscience - think again, because she doesn't have one.
Okay, so now we've resolved that one let's move right along to the main item on the agenda which is your lying twat of a husband.
If you want to stand any chance of transforming this piece of lying shite into a man that is worthy to be your husband, you will come to the conclusion that you are doing your utmost to avoid by deluding yourself with the thought that an appeal to the ow will ensure she sends him back to your loving arms.
In the unlikely event that pigs can fly this were to happen or that this particular ow dumps him, he'd simply take up with another one - and another after that until such time as you start playing bad cop and laying down the law.
Of course, if you truly love this dishonest, deceitful, adulterer man, you'll set him free to love where he chooses but if you want to stand any chance of having him come back to you grovelling begging forgiveness you'll open the cage door with a deafening clang and ensure that he is propelled through it so fast his feet don't touch the ground at the speed of light into the harsh reality of living without the creature comforts that you have so faithfully provided throughout your marriage.
He's playing away because he can; because he knows you won't get mad and you won't get even. Show him just how wrong he can be, honey, and he'll the learn the hard way that he can't have his cake and eat it at your table.
He's rubbing your nose in it, sweetie, and now that I have hopefully dissauded you from handing your power over to the ow and tantalised you with the prospect of having a reformed character on your hands at some point in the not too distant future, I'm going to let my learned friends rush to your aid later today and give you the