The title seems a bit dramatic but here is the situation:

E is almost 15 months and is generally a happy content kid. However, being a stay at home mom means I spend a lot of time with him- reading books over and over, playing cars, chasing him around the park etc etc. There are times during the day when I'm not available- most notably when I'm doing them dishes (we don't have a dishwasher so this happens after every meal) or cooking. I tell him that I can't play right now and his responses vary. Sometimes he play happily on his own for a while, sometimes he cries a bit then goes and play, sometimes it's a full cry while he clings to my legs for the whole time.

Here's the catch. I'm due in 3.5 months in which suddenly I will be very much unavailable during the day nursing, taking care of new baby etc. I want to prep E for that as much as can. Right now I feel like his "independent play" threshold is pretty low since I am so available to play with him most of the day. But I feel bad saying no when I don't really have anything urgent to do. Like "no... go play by yourself while I sit on the couch and read a book (or look at my phone)" seems indulgent. But I don't know how else to make him More comfortable at playing by himself without my undivided attention.

What do you all think? Mamas of two (especially those so close in age) iwas this ever something you had to work on?