[Slap My Jack]

Hand 1:

You have the king and jack, so I don't hate a call to extract more.

Hand 2:

A little less FPS with the betsizing here.

Weak bet on turn plus potting the river screams "oh damn I failed to induce action and want value now" or that you overplayed JJxx and caught on the river.

It's not like he has to checkraise on this turn to protect his hand, and he's playing his hand as a bluff catcher now unless he flat called TTxx which should be willing to put more money in later with little problem.