My wife's panties

She is back from office later more often.
And she is always showered: nice smelling woman and dressed up perfectly.
She is always tired.
But very relaxed.
And the day after I find in the laundry her sexy panties with white stripe inside.
Recently she is also not very willing to have sex with me although when she does she is always hungry.
Ah almost forgot: she got a promotion from her manager.
Please have a look to her panties. Is there any change that she is doing extra work at office? Please comment