"Anyway, even racist angels can be useful, pay them in books and complicated electronics and kittens if they don't want to hear from me about their shopping lists, install them in hospitals if they know what they're doing - angels need a lot more expertise to do complex work than demons do, but plenty of the ones who like taking summons know enough to work medical miracles."
"On the other hand, angels are - on the level of the individual person - just as dangerous as demons. They can't destroy a whole planet, they'd need to actually have learned things about explosives to do any large-scale damage, but they can turn somebody into, say, water, as easily as they can shake your hand. Accordingly I will want to go over in painstaking detail how you do a binding - you can always loose the angel later if you want to trust them, but one you don't know will need to be neatly confined to circle during negotiations and attached to a well-specified task after. You can summon me under a binding, too, if you want, but I wouldn't really be thrilled about it and I think I've more than demonstrated that you don't need to. I also don't see any good reason to teach you how to gag any daeva."
Cam goes on in this vein for a while. It is very informative. Occasionally he includes anecdotes from his own summoning days and from his previous tasks. He wraps up around when the food is dwindling.
Ivan's kind of bored. He attempts to wander off during a break in the lecture, after he has had dessert.
The boys stay to listen, but Cordelia excuses herself and follows Ivan.
"Oh, Miles has actually got lots better about melting at him, it used to be constant."
She pauses, then adds, "Neither has Gregor."
Please mean that, Aunt Cordelia.
"I would really like this situation to end with a minimum of heartbreak," she says. "But it's... tricky. I suppose it will all come to nothing if Cam vanishes never to be seen again."
"I mean, I suppose it would involve Miles disconsolately building Lego objects for a while, but I don't see a happy result elsewise either."
"The way I see it," says Cordelia, "I have two options. I can sit back and let them all work it out themselves, in which case they probably won't, because Miles seems to be having an uncharacteristic attack of shyness and I don't think Gregor is going to realize how he feels anytime soon... or I can meddle. I am a meddler at heart." She shakes her head. "I'm not going to decide anything until Miles tries the resummoning experiment, though."