While scene itself is well-written, the story would've benefit from some fluff thereafter and from Berry's inner reaction

Mm, love tentacle stuff and this was well done. Wish the plant had seeds mixed in with its cum, though. Then it'd make sense as a way for the plant to spread itself spatially, seeding ponies and having its thick cum later slop out of them in new locations.

As it is, I wonder why a mindless plant that probably takes no pleasure in the act even does what it does.

A minor point, though. This was good ^.^