Fetal triggers, WOW!

The other day, we did the last 5 fetals in the sequence before birth. As soon as we are finished, she stated, "I want to grow in your tummy." "Can we play baby born?" This is something she made up many months ago. She hides under a blanket and pretends to be in my belly. She has not asked to do this in a long long time, it was just a short phase. We covered her up and uncovered her several times(being born) and then she stayed under the blanket while I rocked back and forth snuggling her. She stayed like this for about 45 minutes. I couldn't believe it, but I indulged her. Then she asked again the next day and I told her we could do it one time because it took a long time. She agreed and then just stayed under there for another 30-45 minutes. The next day, she was in denial mode and saying the opposite of how she really feels as a self-protection mechanism. She said she didn't want to do it anymore because it took too much time. I told her it was okay and we could do it if she wanted. Now I'm sad that I ruined it for her. My older kids are taking care of a kitten and she wants to keep it. We explained that it belongs to someone and they are taking care of it until the owner can take it. She then said, "Should we get rid of our 2 dogs and have no one?" It's so heartbreaking...