Just an idea...
"Man Cave," "A Master Spinner," and "Seductive Fragrance" must be completed, BB at max Affection:
-If the MC goes to the Dungeon the same day he used a perfume on himself, whether to see her or just passing through to see Venomina, BB is more interested in him than usual. This repeats each time he enters the Dungeon that day, even when just returning from Venomina.
-After that, BB disappears after laying her next batch of eggs but before the MC can get a new batch started, leaving her outfit behind. Erevi and ED don't know what happened to her. Venomina and her offspring didn't eat her but she remembers seeing BB in the caverns. The hell? She seemed to like being in the Dungeon (and the MC/his dick). Even after several days she doesn't reappear.
-Go to the bat creature caves to catch another one. No 'wild' BBs there. No eggs after the next weekly ingredient respawn, either. WTF?
-Return to the Dungeon at least a day after going to the bat creature caves...BB is back, plus 1-2 'wild' BBs! Guess she wanted some company from her own kind, or maybe thought the others needed to see how awesome an Alpha the MC is. Use perfumes for them, or the contraptions. Once they are at max Affection & have had an orgasm, give them an outfit and name them. They can then roam the Dungeon and behave the same way your first pet does. "What, are you horny, too? Naughty girl!" (Improved rations costs more; all the cells are already improved, no need to buy that again. The BB Affection Cheat does work on them. Potential for FFM/FFFM scenes.)
-'Wild' BBs and eggs return to the bat creature caves after the next weekly respawn following BB returning to the Dungeon. Though with 2-3 BBs in the Dungeon there's not a lot of need to go there other than collecting musk glands, and those can be bought from Makith.