I have a daughter who turned 2 y.o. in June of this year and I have a son who is almost 8 months (they're 19 months apart). After my son was born, my daughter went through a difficult time with taking naps (and she wasn't even 2, so I sure wasn't ready to give them up). I would still put her in her bed and tell her that it was nap time, sometimes she would cry a little and sometimes she would just play. Eventually she went back to sleeping during nap time. I think for her it was difficult knowing that something was going on while she was sleeping; that her brother was getting all may attention, etc. That may be what's going on with your son. Continue with the nap routine to show him that nothing has changed. If he still refuses to nap, maybe he is ready. When did your oldest stop napping? Good luch, it sounds like you need all the quiet time you can get.