Locking my partner in the toilet

IT, now I understand. What a dirty trick to play on you with claims of pregnancy. Then all in good (or evil) fun then. Two can play at that game huh. One person gets pissed another person gets freaked out. Play w/ fire and you do get burned.
NOW it seems like simi harmless fun. Enjoy that kind of fun, it makes memories and keeps the fires of love burning often times if it is mutual.

there are many reasons why she could have been upset
1. adults generally like to be in control of when, where they go and what they do, by locking her in you denied her of this right
2. many people who are usually ok get justifiably scared or anxious when the above right is denied them
3. Although you are her partner, she probably did not expect you to do this, so it will have placed doubts in her mind about you, this is not a nice thing to have, so she may be cross that your action has placed doubts which she now has to deal with.
take it from one with lots of experience of being locked in a small space againgt their will, so many things flash through the mind in the first minute, everything from panic, how long am i going to be left in here, is the captor going to leave me in here indefinitely, what about food, what about drinks, sleep, the kids, will people miss me, right through to showing you your own mortality and ways to try and escape, anger to your captor is a definite reaction to being locked in.
basically you held her hostage for the time she was locked in and her thoughts and feelings will have been the same as any other hostage.
doing this to a person is very wrong, that is why laws put away hostage holders for a very long time.
please do not ever think of doing this again to her, it really is not nice and is on a totally different level than her pretending to be pregnant.
pretending to be pregnant does not take away any of your human rights, locking someone in does!

Feeling out of control is scray for some. Being locked in a room against your will can incite the flight or fight response. I think anger is a natural response to feel trapped. It is the part of our brain that is very instintual, and needs to feel safe and in control.

I don't know the releationship you and her have or exactly how it came off to her. Myself I would have probable kicked the door open if I felt trapped. I'm not claustrophobic, but I don't like feeling trapped for the sole enjoyement of someone else. I think it would also break some trust and I would probable start to emmotional distance myself from them. Then again I generally view the world as dangerous and I either fully trust someone or completely distrust them, that is just me though. That's not really the typical person I think.

It, I think, depends a lot on how it was perceived, which in turn depends in significant part on how you went about doing it and how her mood was at the time. I can see it being taken either way.

The best thing to do though is simply to explain that you meant her no harm by it, that you were only playing, and you didn't mean to upset her. That, I think, is the best course of action.

Hugs,
Harley