"Good, I wouldn't want you to see me lose my temper." Neville tended to keep everything inside and then when he was able to, he would lose his temper in his own time. Besides, like he told his daughter, losing it wouldn't help her in the slightest and there was nothing he could do about what's happened - only what's going to happen.
Neville cuddled his daughter and smiled, even though he could tell she was still very upset and in a bit of shock. "I know darling, I love you too." He squeezed her once more before turning his head and letting her drink the blood, just before Hannah burst in.
Both his daughter and his wife were shocked, Hannah was newly shocked and horrified however. Even though he tried to console her, saying quiet things like "I know... please, it'll be alright..." but it didn't really do any good, considering Hannah still had her morning sickness and this just triggered it. Quickly he guided her to a nearby sink and held her hair. A brief glance to Minerva told Neville that they would have to tell her what's going on right then. Bloody hell... what a mess He filed his feelings away for later and rubbed Hannah's back until she was composed enough to go to her daughter.