Opponent unknown.
Figured I was up againt pair of Kings on the flop. After his cap I assumed two pair or more likely lower set. On the turn I was pretty sure I was ahead against those hands - hence the cap.
River I just called since the whole thing just didn't make any sense.
Hand converted with online PokerStrategy.com hand converter:
$0.05/$0.1 Fixed-Limit Hold'em (10 handed)
Preflop: Hero is CO with A:s, A:c.
3 folds, MP1 raises, 2 folds, Hero 3-Bets, 3 folds, MP1 calls.
Flop: (7.4 SB) K:c, J:h, T:c (2 players)
MP1 checks, Hero bets, MP1 raises, Hero 3-Bets, MP1 caps, Hero calls.
Turn: (7.7 BB) A:d (2 players)
MP1 bets, Hero raises, MP1 3-Bets, Hero caps, MP1 calls.
River: (15.7 BB) 4:c (2 players)
MP1 bets, Hero calls.
Final Pot: 17.7 BB.
Results follow:
Hero shows three of a kind, aces(A:s A:c).
MP1 shows a straight, ace high(T:s Q:c).
MP1 wins with a straight, ace high(T:s Q:c).