It is permissible for you to kiss your husband in public because also
Ibn Umar, one of the best companions of prophet Muhammad, once kissed a slave girl in public and no one of the companions said a word about it.
But, you and your bus ran should not kiss in public where other people can see you as you mentioned ...
... or in a place where it is most likely that other people may see them; because bashfulness in one of the traits of faith, as reported from the Prophet sallallaahu `alayhi wa sallam ( may God exalt his mention ) by Al-Bukhari and Muslim may God have mercy upon them. Therefore, one should observe the Islamic etiquette when enjoying his wife.
But, you must know one thing, that it is not permissible for you to make a picture of you to because God’s Messenger (ﷺ) said:
”Whoever makes a picture will be punished by God till he puts life in it, and he will never be able to put life in it.”
However not all picture making is sin. Ibn `Abbas said to a man whose profession was picture making that:
”If you insist on making pictures I advise you to make pictures of trees and any other unanimated objects.”
I almost forgot to tell you that prophet Muhammad also said:
”Angels of mercy do not enter a house that have animated images or dog”
And if you really have to make an animated object then, you must have the following intentions which are accepted by God:
- Image for identity card
- Driving license
- Picture for finding the criminal
- Animated image for educational purposes
If you have these intentions that I mentioned you in the list, then it is ok and there’s no sin upon you.
Abu Hurayrah (may God be pleased with him) reported that the Prophet (peace and blessings of God be upon him) said: "God, may He be exalted, says: 'Who does more wrong than the one who tries to create something like My creation? Let him create a grain of wheat or a kernel of corn.'" (Reported by al-Bukhaari, see Fath al-Baari, 10/385).
God Almighty Says:
”O you who believe! Let your slaves and slave‑girls, and those among you who have not come to the age of puberty ask your permission (before they come to your presence) on three occasions: before Fajr (morning) Salaah (prayer), and while you put off your clothes for the noonday (rest), and after the ‘Isha’ (night) Salaah (prayer). (These) three times are of privacy for you; other than these times there is no sin on you or on them to move about, attending to each other.”
Thus God makes clear the Ayaat (the Verses of this Qur’aan, showing proofs for the legal aspects of permission for visits) to you. And God is All‑Knowing, All‑Wise.
So what do we learn in here is that people should ask your permission so that they can see how you kiss but if they don’t, then you’re not allowed to do that in front of others as per the verse of the Hadith above I mentioned.
CONCLUSION: It is permissible for you to kiss your husband in public as long as no one see you, and if they do, then it will become forbidden for you to do that and it is not permissible for you to make a photo of you.