[Hermann the Cherusker]

If anything, it would help strengthen the bond of love between them and help them support each other in their family life. Isn't that why God created man and woman and the sexual bond within marriage?

No. God created them male and female and the sexual bond to "be fruitful and multiply" not "enjoy each others company".

Question. Why would Mary and Joseph need more children after Christ?

[RonF]

Question. Why would Mary and Joseph need more children after Christ?

Who knows? Why wouldn't they? Why does anyone need children? Because Mary and Joseph had Jesus, that means that God has no plans for anyone else in the family line? What has this got to do with anything?