Peter married and had children. Paul did not marry.
The Bible shows us this.
Jesus visited Peter's house and healed his mother-in-law.
Matthew 8
15 And he touched her hand, and the fever left her: and she arose, and ministered unto them.
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We also know Peter had multiple children because Peter said he was an "elder" of the church and one requirements in the Bible for an elder/bishop was that they have their children under control, else if they cannot control their own house how can they control the church?
I Peter 5:1 (Peter says) The elders which are among you I exhort, who am also an elder, and a witness of the sufferings of Christ, and also a partaker of the glory that shall be revealed:
Requirement for elder/bishop:
Titus 1 (elder/bishop are the same office)
5 For this cause left I thee in Crete, that thou shouldest set in order the things that are wanting, and ordain elders in every city, as I had appointed thee:
7 For a bishop must be blameless, as the steward of God; not selfwilled, not soon angry, not given to wine, no striker, not given to filthy lucre;
8 But a lover of hospitality, a lover of good men, sober, just, holy, temperate;
9 Holding fast the faithful word as he hath been taught, that he may be able by sound doctrine both to exhort and to convince the gainsayers.
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The apostle Paul says:
I Corinthians 9:5 Have we not power to lead about a sister, a wife, as well as other apostles, and as the brethren of the Lord, and Cephas?
Paul chose not to marry for the sake of the gospel.
I Corinthians 7 (Paul says)
7 For I would that all men were even as I myself. But every man hath his proper gift of God, one after this manner, and another after that.
8 I say therefore to the unmarried and widows, It is good for them if they abide even as I.
9 But if they cannot contain, let them marry: for it is better to marry than to burn.
17 But as God hath distributed to every man, as the Lord hath called every one, so let him walk. And so ordain I in all churches.
18 Is any man called being circumcised? let him not become uncircumcised. Is any called in uncircumcision? let him not be circumcised.
19 Circumcision is nothing, and uncircumcision is nothing, but the keeping of the commandments of God.
20 Let every man abide in the same calling wherein he was called.
21 Art thou called being a servant? care not for it: but if thou mayest be made free, use it rather.
22 For he that is called in the Lord, being a servant, is the Lord's freeman: likewise also he that is called, being free, is Christ's servant.
23 Ye are bought with a price; be not ye the servants of men.
24 Brethren, let every man, wherein he is called, therein abide with God.
25 Now concerning virgins I have no commandment of the Lord: yet I give my judgment, as one that hath obtained mercy of the Lord to be faithful.
26 I suppose therefore that this is good for the present distress, I say, that it is good for a man so to be.
27 Art thou bound unto a wife? seek not to be loosed. Art thou loosed from a wife? seek not a wife.
28 But and if thou marry, thou hast not sinned; and if a virgin marry, she hath not sinned. Nevertheless such shall have trouble in the flesh: but I spare you.
29 But this I say, brethren, the time is short: it remaineth, that both they that have wives be as though they had none;
30 And they that weep, as though they wept not; and they that rejoice, as though they rejoiced not; and they that buy, as though they possessed not;
31 And they that use this world, as not abusing it: for the fashion of this world passeth away.
32 But I would have you without carefulness. He that is unmarried careth for the things that belong to the Lord, how he may please the Lord:
33 But he that is married careth for the things that are of the world, how he may please his wife.
34 There is difference also between a wife and a virgin. The unmarried woman careth for the things of the Lord, that she may be holy both in body and in spirit: but she that is married careth for the things of the world, how she may please her husband.
35 And this I speak for your own profit; not that I may cast a snare upon you, but for that which is comely, and that ye may attend upon the Lord without distraction.
36 But if any man think that he behaveth himself uncomely toward his virgin, if she pass the flower of her age, and need so require, let him do what he will, he sinneth not: let them marry.
37 Nevertheless he that standeth stedfast in his heart, having no necessity, but hath power over his own will, and hath so decreed in his heart that he will keep his virgin, doeth well.
38 So then he that giveth in marriage doeth well; but he that giveth not in marriage doeth better.
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According to the Bible, a minister is free to marry or may choose not to marry.
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