You could probably argue that keeping it under your pillow or on your nightstand while you’re sleeping or carrying it with you around the house is still acceptable since it’s “in use”. In the latter example, you’re literally carrying it with you, and in the former example it’s within arms reach at all times.
That said, should you have an unsecured gun in a house with a child? Absolutely not. They could sneak into your room while you’re sleeping and easily get the gun if it’s on the nightstand.
Besides, I’d expect most gun safes worth buying would be able to be quickly opened in case of an emergency. You have a decent amount of time between someone throwing a brick through a window and them being in your room. This isn’t Hotline Miami. They can’t see through your walls and aren’t going to intentionally make a beeline for you with a golf club.
Edit: at least I hope they’re not making a beeline for you. If they are then you’re possibly fucked no matter what. If they’re making a beeline for you that means you’re the goal and that they’re A) a crazy ex or disgruntled coworker/business partner, B) a kidnapper and/or extortionist, C) a hitman, or D) members of a gang or cartel that you pissed off. You might be able to defend yourself in situation A (probably the most likely situation for the average person), however they might have a gun too. In situations B, C and D, you’re fucked. Firstly, a professional hitman will probably enter your house without you knowing, so it doesn’t matter how much time you have to prepare yourself because you probably won’t see them coming. Secondly, kidnappers, extortionists and cartel/gang members probably won’t be alone and will probably be heavily armed. Even if you successfully fend them off, you’ll probably get shot at least once in the process.