Well I'm not sure if they were actually father and son. But I am looking for this yaoi where the main characters are living together and if I recall correctly the boy was rescued by two brothers and one died so the one living with him, taking care of him is actually his uncle?.. See I get confuse in that part, but another thing i remembered was that it was quite touching so i would like to read it again if someone could help me find it of course cheers!
And just in case someone knows about this other yaoi. It's two lovers who have just started to live together but the little brother was not fond of the idea so he crashes to their place and starts being a brat ;D it was a one shot I think..