No point in arguing with you. You want to take 2.3 months outside Canada, be my guest. I am not going to stop you at all. You have be warned about it, especially you being PR yourself. So go ahead and take your chance. But if, on the off chance, that your application goes into jeopardy or rejected because of you being outside Canada too long, don't come back claiming it's unfair or questioned how Canada track your exits. What you want is us telling you it's okay when it is, in fact, NOT. We all gave you suggestions that you limit your time outside Canada as PR to 2-3 weeks. You need to be aware of your choice and it's consequences of it. You came on here hoping to push the envelope hoping you can bend the rules of PR applicant requirement. You have to realize that nobody goes out of Canada for 2-3 months vacation, that is not the norm (2-3 weeks/year is the norm) and border agents knows this. They are not stupid. Just because there is no example or actual cases you are looking for are found online or on file doesn't mean it doesn't exist or doesn't happen. Perhaps you can sign up to be a Guinea pig and see for yourself what can happen if you stayed outside Canada for 2.3 months as PR sponsor.
On a side note, the border agent can probably see on your file on your return that you have an inland PR sponsorship in progress. If you don't see an agent on return, the computer can track your info into the system by you scanning your passport/PR card on return at self-check kiosks. You have an UIC number that the computer can link through the system that you have a PR application in progress.