KK in a 4b pot 25nl

SO it wont let me post the HH as this is my first post.

Villain is like 20/13 with a 70% fold to 3b and 80agf over like 70...a few hands ago:

PokerStars Game #44949991786: Hold'em Pot Limit ($0.10/$0.25 USD) - 2010/06/02 0:59:27 PT [2010/06/02 3:59:27 ET]
Table 'Aaltje' 9-max Seat #1 is the button
Seat 1: Hunt4theWeak ($21.35 in chips)
Seat 2: madlion69 ($39.95 in chips)
Seat 3: hero ($32.10 in chips)
Seat 5: galumoz ($7.35 in chips)
Seat 6: TheFirst001 ($17.70 in chips)
Seat 7: seserman01 ($40.15 in chips)
Seat 8: yTuJIu3aToP ($26.95 in chips)
Seat 9: vcci ($31.10 in chips)
madlion69: posts small blind $0.10
HERO: posts big blind $0.25
Johnytop: sits out
*** HOLE CARDS ***
Dealt to hero [Ah Ad]
galumoz: folds
TheFirst001: folds
seserman01: raises $0.60 to $0.85
yTuJIu3aToP: folds
vcci: calls $0.85
Hunt4theWeak: folds
madlion69: folds
HERO: raises $2.50 to $3.35
seserman01: calls $2.50
vcci: folds
*** FLOP *** [Tc 8s 2h]
HERO: checks
seserman01: checks
*** TURN *** [Tc 8s 2h] [5c]
HERO: bets $5
seserman01: calls $5
*** RIVER *** [Tc 8s 2h 5c] [8d]
HERO: bets $10
seserman01: calls $10
*** SHOW DOWN ***
HERO: shows [Ah Ad] (two pair, Aces and Eights)
seserman01: mucks hand
HERO collected $35.85 from pot
*** SUMMARY ***
Total pot $37.65 | Rake $1.80
Board [Tc 8s 2h 5c 8d]
Seat 1: Hunt4theWeak (button) folded before Flop (didn't bet)
Seat 2: madlion69 (small blind) folded before Flop
Seat 3: HERO(big blind) showed [Ah Ad] and won ($35.85) with two pair, Aces and Eights
Seat 5: galumoz folded before Flop (didn't bet)
Seat 6: TheFirst001 folded before Flop (didn't bet)
Seat 7: seserman01 mucked [3c 3s]
Seat 8: yTuJIu3aToP folded before Flop (didn't bet)
Seat 9: vcci folded before Flop

The HH showed that he had pocket 3's here..guess he thot this was AK alot, idk.

so this next hand is a different table but same villain.

Range pre: AQ+ 88+? (he called my 3bet in previous hand with 3's so yeahh.. i assume hes folding his lower pp's to a 4bet )
I prob should have 4 bet bigger but it is what it is now.

PokerStars Game #44950089668: Hold'em No Limit ($0.10/$0.25 USD) - 2010/06/02 1:05:33 PT [2010/06/02 4:05:33 ET]
Table 'Alstede' 9-max Seat #7 is the button
Seat 1: Ljuti_Gusar ($58.95 in chips)
Seat 3: HERO ($27.05 in chips)
Seat 5: madlion69 ($25 in chips)
Seat 6: VeeJayJay ($23.15 in chips)
Seat 7: timpson06 ($50.05 in chips)
Seat 8: seserman01 ($25 in chips)
Seat 9: ryang421 ($25.35 in chips)
seserman01: posts small blind $0.10
ryang421: posts big blind $0.25
NPIW: sits out
cchggg: sits out
*** HOLE CARDS ***
Dealt to hero [Kc Kd]
Ljuti_Gusar: folds
HERO: raises $0.50 to $0.75
madlion69: folds
VeeJayJay: folds
timpson06: folds
timpson06 leaves the table
Chaman2281 joins the table at seat #7
seserman01: raises $1.75 to $2.50
ryang421: folds
HERO: raises $3.75 to $6.25
seserman01: calls $3.75
*** FLOP *** [Ac 4h 3h]
seserman01: checks
HERO: checks

ok i check back the flop cause the A is scary as it hits a good portion of his 4b calling range. Should I be betting here? Im kind of lost..

*** TURN *** [Ac 4h 3h] [9d]
seserman01: bets $18.75 and is all-in
HERO??

Thinking about it i feel like hes not checking an A on this flop all that often if he hit. the board is pretty drawy but idk. when he shoves this turn I put him on 99+ cause he prob doesnt think im checking back this flop with an A so i guess he could be jamming here with like TT-QQ, some draws (hes really agg), and possi AK-AQ. I guess theres some air sometimes too. basically I feel im beat by a good bit of his range ( im kind of struggling to put him on a realistic shoving range tho) ..but something just seems kinda weird about his line.