#2 To defend his wife in storyline
In storyline, doesn't it make sense that Triple H would defend the honour of his wife Stephanie McMahon? After all, Becky Lynch just assaulted her on Monday Night on RAW?
It's true that Stephanie McMahon acted like a heel towards the end, but the fact of the matter is the overall gist of her promo wasn't fully wrong. Telling a competitor, or rather, forcing a competitor to get medically checked for an evident injury isn't exactly a bad thing to do.
Either way, say what you will, but for once, Stephanie McMahon wasn't fully wrong in what she said. Intentionally kicking her knee in "self-defence" isn't a babyface thing to do, but we'll ignore that for now.
So in a way, it does make sense that Triple H would stand up for his wife and berate the woman that attacked her. Moreover, defending Stephanie would mean instant heat for The Game.