You were, of course, scrying on Eldrain during all this, and doing your best not to laugh too loud as he dashed into his room and inspected your handiwork. There he was, getting every reflective surface out to check for warts and big bulgy veins. Giving things a feel when the breasts started to grow in. You might have set those up a bit early in the process but come on, you'd had to. There was that look of panic... and ooh, what's this now? He had one hand in the top of his robes feeling up those fast-growing mammaries, and the other was down a bit lower. Checking to see if things were still intact? Oh. No, you realized. That was less of a panicked face now. Damn, was he actually getting turned on by all this? That hadn't been part of the plan. Sure, it had crossed your mind briefly, but you didn't want to go full mind-control and turn him into a stereotype. The plan was just to make him some hot orc babe, watch him freak out, see what sort of humiliating stuff he'd do to get back to normal, maybe get a new perspective. Buuuuuuut, if he actually secretly WANTED to be some buxom orc babe deep down, why not let him really explore that?
Speaking of exploring, you might be into watching this once things were further along but you really didn't want to watch another wizard polish his wand, especially not this jerk. So that was enough scrying on Eldrain for now. What else could you do with this chronoviac thing?
You thought about it for a bit, trying to ignore the distant thumping sounds from Eldrain's bedposts, and it struck you how awkward it would get in here if he was really going to go full horny bimbo. You might be willing to help break that new orc body in after a few more days, but it wasn't just the two of you here. There was also the two gnomes sharing the place, Dwezzo and Bopkin. Dwezzo honestly always kept to himself, pouring over tomes. Odds were pretty good Eldrain could end up doing nude cartwheels through the common area and he'd never notice anything out of the ordinary. Bopkin though, he was the nosy gossip-y type. Today he was off in the woods gathering potion ingredients, but the way Eldrain's changes were progressing, he'd be getting real curious. And of course if you eventually got a bit curious enough to help Eldrain explore that feminine side, he'd be telling everyone and that wouldn't lead anywhere good...
It wasn't all that hard to talk yourself into messing with him next. Maybe even Dwezzo too, just to be safe... or you know, set yourself up with a personal harem. Either or. Question of course was whether to play it all off as another aspect of the disease ruse, or... oh! You could make some change to the herbs he went out picking! Use those as a catalyst! He might even inspect them after and see something weird, no suspicion on you that way!