You will get your opportunity to piece how you want to then. You dictate that. Told you that you want you H back but on your terms. This is the WH looking for something, a way out (oh we made up - so it's all fine now) or he is just temp checking. You have sex and then he thinks - still got her where I want her.
No. No. No. He does not have you where he wants you. You have him where you want him. Let him work through it and start really, really realising - this is not a situation that resolves with sex or lame apology. He needs to get to understand his shortfalls, what the consequences of them are viz a viz your feelings. Impacts on your children, his children etc. You need to get that he understands and that he knows that there is a "one strike and you are out policy" going forward if he messes up again. He needs to rebuild your trust and that of your S and his M.
Don't go throwing all that hard work away over a teenage fumble. Forget that. You keep in line with your goals. Don't go flakey. He will have see that this got to you. Avoid it next time. Or let him say whatever and don't get sucked in.
Surfer.
M46/W40/D8/S6/T20/M12/Separated 6/2016,W takes kids Issues2009 Wpartying w/g.f's2013on EA2013PAdeniedWleavesMBR ImeetAP/EAhalts VariousBDDates MFCourse WSpew EAresumes I halt Wrages DBIng4/2016