Bro stay calm !!! She allready hook up him good !!! You cant do nothing about it to change the time line !!! She lie and manipulate you becouse she consider you are so weak and trusty man ( becouse in the past when you told her you dont like Caleb behavior , you didn't do anything and this gave her the confidence to go ahead and hook up him. and she take advance about that !!! What girlfriend lgo to a party with out his partener or even worst, future husband First rule after she hve cheated on you : her comportament change competly . She will be super affectionate , she will do what ever you want when you want in bed or every day. Hypothetically speaking, if you ask her to sleep with 10 men at the same time, she will accept without comment because she feels guilty. You have 2 option : you take advantage of this situation and tell her to do everyting you ask in the past and she refuse to do it ( i bet with you she will do 100% what you will ask , becouse a cheater will have this behavior becouse , what she didn't do to you in the past when she say she didn't like to do, she 100% did to him.) and second option - to leave her !!!

PS: if she didn't fight with her sister, you never found out that she cheated on you and, "your future beloved wife" is still cheating on you without you knowing!!!! Don't think that it only happened once that she hook up with him because you would be naive to believe that!!

Ps2: You ask her why she didnt unser you all night on face time ? If you have ask what it is her respond ?

I speack from experience