Main thing to consider here then is that what is considered “busy” ???
personally i think husband and wife also have right to have their own time with whatever they like be it book, friends, tv etc. If other half is so eager to get attention, things get off path quickly. If I know my wife like/enjoy shopping, I’ll never bug her with useless calls expecting her to answer it every-time putting me before anything else. I’ll let her enjoy what she enjoys… but again ..thats me