nesting (ˈnɛstɪŋ) — n
the tendency to arrange one's immediate surroundings, to create a place where one feels secure, comfortable, or in control (World English Dictionary, Collins)
Compare this with:
empty nesting (ɛmptɪ nɛstɪŋ) — n
the tendency to arrange one's immediate surroundings, to create a place where one feels secure, comfortable, or in control (Lisa)
I think it’s time to paint. A lot.