Teaching job interview 3rd trimester

I just got an email back from a principal saying she is interested in interviewing me.

It is a job 5 minutes away from my daughter's (and also, when she is born, my littlest daughter's) daycare. It would be a dream come true, so i threw my hat in the ring and sent out an email with my resume yesterday morning before school. She emailed me back right after school and told me she wants to set up an interview and the office will contact me to get it set up.

The only thing is I am due in May. The positive part is that the job is for the following school year which starts in August, so my pregnancy shouldn't even impact my job in the fall.

However, I am afraid to make them uncomfortable. I am very petite with a big ol' bump, so it is obvious that I am pregnant all the way from space! The good thing is that the administration is all female, and it is a position at an elementary school working with the prek- 2nd years, so I am hoping they are open-minded. It is also within my same district that I have been working at for years, which is great.

Any advice? Thank you!!!