Who. Convoluted #2

On her lover's bed she brought the guilt-soaked sheet around herself as
the young girl entered the bedroom. The girl's body made the woman despise her own.
44 with a 19 year old lover. She should've known better.
Giving herself whenever he wanted.
Validation.
But who let the girl in?
A second person entered, dropping his keys, already undressing.
'I want you so bad, Angel'
On the bed, the woman's shame flared. She knew his voice, having once been his Angel.
Shocked, he stared at his wife.
His erection dying along with any vestige of their mutual self worth.