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Google in general doesn't like Adwords advertising for pages containing Adsense irrespective of whether you own the site or your father owns the site, as this is arbitrage. So expect low quality scores for your keywords.
Pardon me for butting in just a little OT, but:
Inasisi, I take it from your response that Google doesn't like an Adwords landing page which has any Adsense it.
I've had an Adsense block or two integrated among my landing page content for about 4 years now. Thought Google would like that!
Rather than my intent to be arbitraging, I've sometimes wondered if I'm competing against myself, though Adsense only brings in about 3 checks a year.
When I recently installed the Adsense Preview Tool, I was stunned to see how poor many of the sites were. I had a sense from the ads themselves that they weren't quality advertisers. So frankly dumping Adsense from the landing pages is no loss to me.
I got slapped a month back on one of my big sites and am just finishing rewriting it entirely. Until then all was fine (more or less).
While Dad isn't involved at all in my case, I've always had the same login for Adwords and Adsense. Thought that was the right and proper way to do things and the Google portal seems to anticipate that both products might be on an account.
What about Adsense on content pages inside the site that link from the landing page? Is that okay? I do have some new content pages that talk about high dollar items.
My sites get SERP searches as well as Adwords clicks.
Am I reading too much into your answer, Inasisi?