children tend to get very attached to their grandparents, especially as they get a lot of love, attention and pampering from them. this is natural.
if your wife is feeling left out or neglected, she can start spending more quality time with the child. instead of just looking after his studies and responsibilities, ask her to have some fun too and take time out away from the house. something as simple as cuddling and sleeping or doing bedtime stories and chatting can also be a great way to bond.
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