Yes (lactation route)

"I think I figured it out! Over reversed the polarity of the neutron flow!" He exclaimed.

Belle wasn't sure what that meant, but "reverse" sounded encouraging. Without thinking, she followed him down to the cellar, still holding a jug of milk. As she stood before his machine, she realized her mistake, but turned around to place it on a table directly behind her.

"You'll need to bare your, ahem, chest in order for it to work properly..." her father instructed.

"I know. I still can't believe Gaston pulled my dress and bra down. At least I gave him a good shove, but that saved him from getting hit by your contraption." Belle recalled.

Bee now stood naked before the machine, hands covering her crotch. She waited patiently, hoping this would work.

"Just stand still..." he said throwing a switch.

An electric pop and sizzle emanated from the switch as the power was exchanged. The machine began to thrum as it seemed to power up. Belle was all too familiar with how it went last time. Her father was meant to hit a large wooden log, shrinking it for easy transport before being able to be enlarged at a later time upon arrival at its destination. At the time, he only had the shrinking part done. The enlarging seemed like a pipedream, but now it seemed he just needed the right motivation.

Pfffffthrummmmmvvvvvvrummmmmmmm

Belle had run into the cellar to escape Gaston's advances, but he pulled her dress and bra down, exposing them. And she pushed him away just as the beam fired. Instead of firing at the log, the contraption tilted and the beam hit a pot, ricocheting it into her chest. As Belle recalled this, she realized...

"Papa, did you secure the machine so it won't fire off target?" Belle called out.

"Oh, why I...did I?" He said, in thought.

Belle looked at the machine as the end of the barrel glowed.

vrruuummmmmzzzzzzzzzzzttttttttttttttt
POW

The machine fired! Belle saw the barrel move upward, and looked up to see it hit the pot again, but ricocheted to the side. Belle turned to see it hit a mirror and head for her. She braced for impact, but the beam missed her by an inch and hit the milk jug, breaking the glass container, spraying milk all over Belle's chest.

Belle gasped in shock, and checked for any glass shards that may have hit her, bit thankfully found none! She groaned as it seemed the beam was a bust, but at least they could try again. After she cleaned herself off, her father went to reinforce the machine to make sure it wouldn't move. However, as Belle stood there, she felt an itch in her chest. Looking down, her breasts began to grow!

"Papa! Stop fiddling with that thing! It worked!" Belle cheered.

Her breasts were soon back to their original size, and she happily grabbed them, as is welcoming an old friend. However, something was...different. Her breasts continued to grow! Belle became concerned as they became a full cup size larger. As she rubbed them, she felt her nipples tingle, and became erect. She gasped as they were easily double the length and girth they used to be. She pinched her nipples, and was shocked to not only feel an intense pleasure, but also saw streams of milk shoot out from them!

"Papa... I'm... I'm producing milk?!" Belle cried, confused and a bit scared.

Her father looked at her and used his magnifying goggles to look closely.

"You seem healthy, but it seems you have grown a pair of udders, my dear. Perhaps a side effect of the milk..." he said.

"C-can you reverse this?" Belle asked.

"I'm not sure I can. It was already a long shot to just understand how to shrink and enlarge objects. This...this is an entirely different circumstance. I'm sorry, but you'll have to live with it for now. At least you are bot so flat anymore!" He joked.

Belle covered herself amd ran upstairs, wanting to be dressed. She just hoped her clothes still fit...