I'm so sorry you're going through this. My H introduced S3 to OW and even kissed her in front of him. S3 told me. It's been almost a year I've been on this roller coaster (I hate roller coasters!) and I have learned more in these past few weeks than I did previously. FOCUS on YOURSELF! Work on yourself for you so you can be a better person/partner and most importantly a better MOM!
You're impulsive decisions (going to check up on him, arguing and begging) are not you! We do the CRAZIEST things in the beginning. I know I did!
Take care hon, We're all here to help each other out
M 42 H 39 T10 (-2yrs separation) S8 D5 DD 7/30/11 (EA&PA) Reconciled 6/2013 Separation in works 1/2017