If the baby is just 1.8months old better not to take him/her to any nursery.
but make the mother speak with her/him the maximum at home and play with the baby maximum at home when the dad is out for work and then slowly when the baby is 2.6 u can try in a good nursery by leaving the baby along with mother also for few (may be 1 hr and the 2nd day 2 hrs)hours and by then the baby will enjoy the company of other babies of the same age and the caretakers.

I am a mother of a baby boy....telling from my experience...