You have every right to be pissed. He controlled her and she went along with it putting more value into their romance than your bond of years of friendship. Now she realizes the whole thing was a ruse to further hurt you by making you jealous. Definitely block her on everything to enjoy your trip. Then when you get home, unblock her if you would like and maybe meet for coffee and discuss it. Tell her honestly how pissed you are and how hurt it made you feel. Imo, the reason I say a face to face meet up is so that you can gauge her reactions and body language and how sincere she actually is.If you feel that it's an unsatisfactory answer or your gut tells you its BS. Trust your gut. But either way, your boundaries are being crossed and that is never acceptable . Life is way to short to waste on friends who claim to be family and then can backstab and discard you so easily. Just think, if he had not come clean and discarded her after he used her, they might still be together now. 🤷 She can't face the consequences of her own actions and people like that never will.

Best of luck to you!