Possible to create an object inside another object that is visible outside that objec

[MeghansUncle2]

The question means: I have a class that i want to instantiate and use by passing it to at least two other objects. But I don't want to instantiate that class in the main body, i would rather instantiate the class (create the object) inside another completely different object (possibly in its _init_ and share that instance with a completely seperate object.