Difficult desision for KK

[ZoolooZ]

Afraid i cant find the hand history for this hand, but ill do my best to recap.

Playing .25/.50 NL Hold'em
My stack $75

UTG raised to $2
Folded to me on button with KK and i raise to $6
UTG calls

Flop 2 7 10 rainbow

UTG Checks
I bet $8
UTG Moves in for $70

What should i do?

If you think its a call please list the hands i have beat!