Hi, I am having a formal, indoor wedding next fall. At a recent family dinner with my FI's parents, the topic came up of wedding attire. My future FIL innocently asked if he would be expected to wear the same purple tie and vest that the groom and gm would be wearing. I said no, just the tux and a black tie would be fine. He seemed to like this idea. Then, my future MIL went on a strange and unexpected rant about how the FOG never wears a tux and that she's been to tons of weddings and has never seen the FOG wear a tux. Only the FOB wears a tux because he's giving away the bride. It was an awkward moment for everyone, including my FIL. I really love my FIL, he's like a 2nd dad to me and I would never want to make him feel or appear less important to the wedding than my own dad. After my FI expressed this to his mother, she apologized for the outburst but still didn't seem to get it and maintains that it's just "not done". Sorry for the long post. My question is, is there anyone out there who's father is wearing a tux and not the FOG? I have never heard of this so called custom and it seems very unfair, especially since he likes the idea of wearing a tux as well. (I should add that this is not an issue of finances. My FI's parents are more than able to afford a tux rental).Thanks!