KungFu the judge will not tell the mother off for standing at the window laughing. That's not what the family court is about. The judge does not tell parents off in that way.
The mother has been pictured on Facebook clubbing.
We know no details. She may have been home by midnight, thus not leaving the baby overnight with anyone. We don't know. We do know that the mother did not want her baby's father in sole charge of her baby overnight. This is reasonable and understandable - mothers of tiny babies are expected and supported to make a judgment in this way, and it's quite separate from whether the OP comes across as charming, even-tempered and patient when things don't go his way, or not.
It's been explained that if it came to court, the needs of the baby would be paramount, and overnight stays with the father would be something not demanded by the father, but worked towards over time, in line with what the baby's development would allow.
It's ridiculous to argue that because the mother arranged babysitters to enable her to have a night out, the baby's father should be 'allowed' to have sole charge in his home overnight. That's not how it works, and a good thing, too. A father showing resentment and irritation at this is not demonstrating any understanding or patience....just possessiveness and peevishness. Not good. And while the judge will not tell him off for this, it would certainly be noted.