I feel so bad for Ted Cruz's family and daughters. I don't blame Trump, I fault Cruz for requiring his family to show up to a dinner that symbolizes that Cruz has brought his wife to Trump's dinner so she can suck his dick while their daughters watch.
Normally I try to phrase things in such a way to avoid vulgar language, but in this case a vulgar analogy is dead on target. Its one thing that Trump attacks Ted Cruz personally during the campaign, but to insult\attack Cruz's wife was sooooo wrong. Its only compounds the insult that Cruz brings his family to have dinner with Trump, which is why the analogy fits; Cruz is symbolically saying he is capitulating to Trump, and brings his wife and daughters so they can meet the man who has total power over their entire lives, and if Trump were to ask for anything, his wife and daughters are expected to submit.
Of course Trump would never ask for oral sex at a dinner party (at least not in this situation), but he would test Cruz in smaller ways such as “Hey Ted, would you’re wife mind helping out in the kitchen? My wife is too busy entertaining the guests. Thanks, I knew I could put her to good use!”