I guess the only way to verify the claim OP is making is to check the inbox to see if there is really a message from that lapongetiasuu user. If the message exists then we need to assume that OP is telling the truth about the father and son account too.
How old are you btw? I find it amusing that your father is also a member of the forum.

I am also interested to know the age of OP.
Yeah message is here in my box bro.
My age above 19 exactly I cannot say, Its anonymous, LOL.
First of all I'm not accusing you as a scammer. Actually I'm helping you to this extortionist. I didn't said that you scammed the manager and I didn't said that you're a scammer either. I just want you to provide evidence whatever evidence you can provide to prove that it is not really your alt account.
You are great, Thank you so much bro, I have already given a way to identify that whether I scammed anyone or being alt user. If you require evidence, can you tell me what I can share here as a evidence?