Matthew 8
14 And when Jesus entered Peter’s house, he saw his mother-in-law lying sick with a fever.
15 He touched her hand, and the fever left her, and she rose and began to serve him.
mother-in-law
Peter's being married is also consistent with his role as elder in the church.
1 Peter 5:1
So I exhort the elders among you, as a fellow elder….
Titus 1:5–6
…Appoint elders in every town as I directed you—if anyone is above reproach, the husband of one wife, and his children are believers and not open to the charge of debauchery or insubordination.
He touched her hand, and the fever left her
As was seen in the healing of the Centurion's servant, Jesus has great power to heal with no real effort on His part.
she rose and began to serve him
This reception is far better for Him than many that are recorded in the gospels.
When we consider Peter's mother-in-law, her illness prevented her from doing what she wanted to do. Her healing provides the first opportunity for her to make a choice. And what she considered important was to serve Jesus on His visit to her home.
Her emphasis on the spiritual reminds us of another who was prevented by his physical condition from doing what he wished. This man made clear his desire for spiritual things when he was healed, just as Peter's mother-in-law had.
Acts 3:2–8
And a man lame from birth was being carried, whom they laid daily at the gate of the temple that is called the Beautiful Gate to ask alms of those entering the temple…. Peter…took him by the right hand and raised him up, and immediately his feet and ankles were made strong. And leaping up, he stood and began to walk, and entered the temple with them, walking and leaping and praising God.