I'm also pumping almost at every feeding while DD nurses on the other side. And, we're now struggling to get her to take a bottle - any bottle - at 2 months. I'd say go ahead and offer a bottle in the middle of the day. Perhaps after your son has had a little to stave off the hunger pangs but while he still has a drive to eat. As long as you watch for any nipple confusion, I don't know if every day is necessary but it might be. Start with one day and see how it goes... Worst case scenario, you have an opportunity to go get a mani/pedi while someone else watches the baby.