Villain c/c then donks the turn?

15/8 nitish opponent Thus I was raising a bunch on the button.

$0.1/$0.25 No Limit Holdem
5 Players
Converted at weaktight.com

Stacks:
UTG UnrealCall ($21.15)
CO Mueggi III ($28.15)
BTN Hero ($25.35)
SB verge85 ($27.60)
BB baby_boost69 ($51.15)

Pre-Flop: ($0.35, 5 players) Hero is BTN
2 folds, Hero raises to $0.75, verge85 calls $0.65, 1 fold

Flop: ($1.75, 2 players)
verge85 checks, Hero bets $1.25, verge85 calls $1.25

Turn: ($4.25, 2 players)
verge85 bets $2.50, Hero calls $2.50

River: ($9.25, 2 players)
verge85 checks, Hero ($20.85)?

Cbet to get him to fold his KQ/AQ/77 type of hands.
Turn donk bet I would really like to hear some thoughts on what this means. I myself have done this with sets and two pair hands.

So I think calling is best right. For one he might have a better flush draw and if I raise and he 3bets it's gonna be nasty for me since he can have better draws. Also since he was tight I had not seen much of his post flop play and I am not even sure if he plays draws llike this so I think his range on the turn is Toppair/sets/twopair some weird play with an underpair and like backdoor nut diamonds. oh throw in 78/QT and maybe some 9T/98 hands.

So when he checks do I bet or just check it?
Villain could have done this move with AJ/KJ/QJ ish hands and might be trying to induce from me same goes for 2pairs and sets. On the other hand he might have done this with nine/underpair/semibluff/air here and is giving up. Plus I have showdown value vs 87 lol

SO CHECK OR BET? if bet HOW MUCH? If Check/Raised do we 3bet as a bluff or fold :P

I think he either has top pair that wants to get value from draws on the turn, or he has a mediocre pair / A high / straight draw (AdXd, KdQd, 9d8d, 8d7d, 7d6d) that turned some equity with a flush draw. Notes would help here a lot.

We definitely can't bet/3bet the river... there is just no amount that gives us any kind of fold equity. The best I can figure is to bet like $5 hoping to get some of the weakest pairs and Q-high or better to fold, but I would expect to be called by a lot of J pairs and even a weirdly-played overpair.

And as for your cbet, I'm not sure whether it folds out any of the hands you mentioned. Preflop nits aren't always postflop nits, KQ has so much equity that calling can be profitable here (obviously, considering that you have any 2 suited in your range), and a Villain with a hand like AQ (especially with a backdoor flush draw) or 77 might just get stubborn, being tired of constantly folding to your cbets.

The turn is pretty dicey. Villain's bet really looks like he's trying to keep the pot small, so I'm tempted to make it bigger and raise to like $9-10. Of course we have odds to call, but then again, we could be chasing a flush-under-flush.