Don't have him paged... just do it... If everyone at work knows ANYWAYS this just serves to humiliate HIM...
Write a script ahead of time too... "you are not welcome in my family" is terribly weak...
"This sleazy office affair and you meddling in my marriage is going to END... NOW... You do'nt think I am gonig to stand aside and let the likes of you near a two year old girl do you?"
YOu could even address all teh toher women out there and tell them to watch this creep and make sure he isn't manipulating your wife anymore... Tell them she's been ill for some time now and this creep is exploiting it for sex to have sex with her..."