A lot. But it doesn’t all have to be sit-down-one-on-one. There are ways to bring a 2-year-old into home activities along with his mother, and children love this “real” play. Given a sink full of warm soapy water and some plastic bowls and glasses, a 2-year-old will “'work” contentedly for a long time while the parent does other things in the kitchen.
A trip to the supermarket is like enrolling in a graduate course at a university. And throughout the day there are opportunities to talk to the child and listen to his replies. But these impromptu teaching moments do not satisfy the need for special times when parent and child sit together and read or work a puzzle or build with blocks, or just snuggle and giggle together.
You know what? You’re asking the question of the wrong person. I’m on your side, and you should feel free to say that to your wife. But the one you really need to talk to is your wife. Give her ample time to express her feelings about the situation. Those feelings are certainly important in helping to decide whether you want to have another child. And, if she indicates that she feels the burn-out you suspect, look for a quality early childhood program to enroll him in on a more regular basis.
Our parenting advice is given as suggestions only. We recommend you also consult your healthcare provider, and urge you to contact them immediately if your question is urgent or about a medical condition.