So he can make a proper decision? As if Hob's decision hasn't already been made? Changing his mind now would hurt Hob, too, as would being rejected by Loki.

His hand touches Loki's side, moving in a soothing motion back and forth. "You're not going to change my mind." But Loki will know for sure when he tells Hob the things he needs Hob to know. "Go on." He can talk about it if he's ready.