NL25 - Top pair against super lag fish

[Jw513]

Both hands are against same vaillain. This villain runs 65/45/2.15 over 100 hands. His street by street AF is 1.6/2.7/4.3/3.7. He's been bluffing alot, doesnt like to fold any pair.. and getting his money in terribly against other players.

Party Poker No-Limit Hold'em, $0.25 BB (5 handed) Party-Poker Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

Hero ($24.40)
MP ($29.14)
Button ($24.65)
SB ($26.25)
BB ($106.71)

Preflop: Hero is UTG with , .
Hero raises to $1</font>, 1 fold</font>, Button calls $1, 2 folds</font>.

Flop: ($2.35) , , (2 players)</font>
Hero bets $2</font>, Button calls $2.

Turn: ($6.35) (2 players)</font>
Hero bets $4</font>, Button raises to $11.48</font>, Hero ????

Is there any chance I fold this?
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In this hand, it just went shorthanded like 5 hands ago.

Party Poker No-Limit Hold'em, $0.25 BB (3 handed) Party-Poker Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($25.28)
BB ($10)
Button ($51.52)

Preflop: Hero is SB with A, J. Button posts a blind of $0.25.
Hero raises to $1</font>, Button (poster) calls $0.75.

Flop: ($2) 7, A, Q (3 players)</font>
Hero bets $2</font>, Button raises to $5.75</font>, Hero ???

What do we do here? Just call? Shove?