NL50: overpair on 1gapper board

[von7thal]

PokerStars No-Limit Hold'em, $0.50 BB (5 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: ITH Forums)

BB ($54)
UTG ($51.90)
MP ($193.75)
Hero ($50.20)
SB ($49.25)

Preflop: Hero is Button with :jd, :js.
1 fold, MP calls $0.50, Hero raises to $2.5, 1 fold, BB calls $2, MP calls $2.

Flop: ($7.75) :8c, :5d, :7h (3 players)
BB bets $4.5, MP calls $4.50, Hero ?

bb: unknown, neu am tisch
MP: 50/13/0.5 über 8 hände

wie spielt ihr? fold imho way2weak. raise? call?
strange plays der beiden.