Huge gap between my children

It has been 15 years since I gave birth to my daughter vaginally with an epidural. I had an episiotomy. I am now 20 weeks 3 days pregnant with my second. I was wondering since it has been so long since I gave birth if having my second will be like having a first baby? Will my body recognize that it has done this birthing thing before? Sorry if this question sounds stupid, but I plan to go natural this time around, and I am not sure if there are any moms out there that have gone through what I will be going through soon. I am due Septemner 5th.