Spoiler Question about Strangerville [Spoilers inside]

I Finally did it too after getting out without saving because my sim died then going back and finally killing it

Oops, I didn't realize. I thought I was supposed to keep the tags around it. Thanks for the info, it's very good to know. :)

So exactly how do you befriend the Mother Plant? Can an uninfected Sim become friends with the mother plant by trying the Attempt to communicate interaction? Right now we are just acquaintances.

I did find out that if you eat one of the fruits you will become infected, but even though I had a key card I couldn't get past the key card doors.

Right. The key-card wouldn't work. And I was able to make a friend of the resurrected plant.