I like the idea of asking for the moon custody wise in a polite way and making her try to negotiate you down to 50/50, at best.
She's staying at her sisters...that's not a real workable living arrangement for S9 and he can run home every night, sleep in his own room and bed until she has a decent place for him to actually LIVE. Even a 9 year old boy needs his own space...he is an only child after all (another good point to throw in there). He can "visit" and spend the night there every other weekend and in emergency situations where you are unavailable. S9 can spend time there maybe Tuesday and Thursdays OR propose something like mon/wed's till 8 or 9 pm on weeks after you had him for the weekend and Tues/Thursdays on weeks she had him on the weekend. But 12 of every 14 nights he is sleeping in his own bed.
Plus, it's also good to put pressure on her [and OM] to come up with a place of her own versus shacking up with family. See how fun an affair is when it's more than just some daily flirting at work, constant text messages ("i love you more; no, I LOVE you more; no, I love YOU more"), and a date night every weekend. Real life and real pressures break relationships built on infidelity quicksand.
She won't necessarily agree but why just hand her even 50/50 when she was perfectly fine with taking all the custody when you had to move out (due to her misbehavior - not really your own choice)
The internet is 90% complaining and entitlement and I hate it because I deserve better!
