Wife 20 wks pregnant no movement and cannot feel baby is this normal?

Her stomach isn't even hard and we have had ultrasounds and saw the baby's heartbeat and saw it moving. Is this normal not to have any movement and not to feel anything hard in her abdomen. She hasn't bled and doesn't get her period.
This is her 4th pregnancy 1 miscarriage included. She's not big at all either!
I would ask my wife but it seems like she gets irritated alot