The first tentative intro between the boys and the kittens just happened.
I was moving them from the en suite to the 2nd bedroom. In their playpen, of course. Madoc sniffed and gave a half hearted objection and when I said he name, he bolted. Gryff tip toed into the room for a few seconds, and the he also bolted. I think in a day, or so, the boys will do like Sophie did to them, and pretty much put them on ignore. As long as the kittens don't bite their tails. Then in a couple more days, they might just tolerate them.
Naturally, the kittens will never be out of the playpen without me hovering over them. And the bedroom door will always be shut if I'm not in it.
I'm trying to work up the energy to get the house in order because family is bringing dinner over, today. I should be able to get some good pictures, this afternoon. If I can keep my eyes open. I slept past the 2am feeding time - didn't hear the alarm - but fortunately woke up at 2:15. Which reminds me - time to mix up more kitten milk. At 10 I'm giving them a slurry of food to see how they do.