Is the end near for Dad?

Dad will be 96 next month. He has dementia and was in AL memory care with 24 HR live in aide until 2 weeks ago. The aide was there because he pushed another patient. He was declining. Constantly choking on his food and drink. Ended up hospitalized with aspiration pneumonia. Modified barium swallow test showed poor muscle control. In rehab now, he's on a honey thickness pureed diet. He won't eat. Maybe 4 teaspoonfuls and refuses eat anymore. Hardly any liquid consumption. His voice was clear but now very weak and doesn't really say more than a couple of words. It almost appears that he doesn't move his mouth to talk, which could be suscle control. He can no longer walk with help from the bed to a wheelchair. He still knows me (only child) and he knows his birthday, his name and call spell his last name, but that's about it. In rehab so that maybe he can be strengthened enough to make transferring easier, but I don't see it happening. The speech therapist told my that it takes about 33 seconds for him to eventually swallow. I'm afraid that his time with me is coming to an end now. I keep telling him that I am OK and that if he wants to go see mommy it's OK. I will be OK but he never answers. Anyone else been through this with the aspiration pneumonia?