I can not believe FH's twin brother

He has completely hurt my baby. FH called him to let him know that we had gotten a discount rate with American Airlines for flight and the A!@!@@$ told FH. 'I told you I wasn't going to go'. Well thats totally not true and FH says to him 'You know you are My BestMAN? What a d@!@@. How can your twin be so cold. FH and I understand that travel ETC can be costly, especially if you are planning to bring the whole family (thats 4 total, if his nasty wife and beautiful children came) But then he should of said no before. We have been planning for over a year. I know that money can be tight, but gosh your own twin brother.... If you can't afford to bring everyone, I would think he would at least come on his own. I am beyond pissed of