I open A♥ A♦ UTG to $20, 5 people call including the blinds.

Flop: K♠ Q♣ 6♥ Pot $120 I bet $60 cause I'm scared with so multiway and there's only 1 realistic str8 draw, only tight old man calls in CO, I cover him, he started with $400.

Turn: 8♣ Pot $240 I'm putting V on KQ/KJ/66/QQ/JTs. I'm pretty scared and I bet only $80, he calls.

River: A♠ Pot $400 V has $240 left and I shove.

Please provide feedback for each street with reasons.