Slap yourself in the head and reread that post! Stop after "She said yes and we drove back home so she could see the kids"
If she is not ignoring you and wandering around in a haze of NRE babbling about how amazing this person is (even if she IS) why are you borrowing trouble after getting through the week in such a shining fashion? If you already had insecurities about your sexual interaction with her, keep working on it, and if you didn't, why would you start thinking negatively now? The chances are pretty miniscule that different sex means better sex, and pretty good that the thought "oh I wish he was doing that like KyleKat does it instead" may have flitted through her mind at some point.
Yes, she is home. Don't let anything else matter except that she loves YOU. Glad you realize you're being an idiot