Grandparents

Bismihi ta'āla

In our Islamic tradition and culture, relationships are not just personal and individual. It is the coming together of two families. It should not be done in secrecy. That is a big red flag. How will he maintain his respect to her, if she's gone behind her family's back and done the most important thing in her life, without telling her family.

As is most cases, the male will definitely use this in a way that he will not show accountability to her family, and many other wrong things. 

If she has not been married before, and even if she has been married, involving family is very important. 

And Allah knows best 

Bismihi ta'ala

As the holy verse in the Quran says God's mercy encompasses all. You can ask the Almighty to show His mercy upon them, and overlook their shortcomings, etc. 

Unfortunately some Muslim groups believe it is haram to prayfor a non-Muslim in any way, but reality is such an approach is difficult for one whose family might not have recognised Islam and be good people. 

Just requesting Almighty God to show His mercy would hopefully assist them in their next life. 

And Allah knows best.   

Bismihi ta'ala

It's greatly noble that they are very good people, and for sure their nurturing contributed to your personality as well. 

As you know, religion and becoming religious is a choice that must come from within. Even as Muslims, we always pray to Almighty God to keep us "guided" on the right path. Hidayah, or guidance is in the hands of the Almighty.  If your grandparents, or anyone else around you has a potential that Allah ta'ala sees in them, then they will be guided to the light of Iman. If they do not "convert" to Islam, it does not mean they are evil, but just that hidayah is with the Almighty. 

The best thing you can do is set yourself with high standards in your conduct, in your ambitions in life, and show those around you how a true Muslim should be. 

That itself is a great form of conveying the message of Islam, and then it is up to them to investigate, or ask questions, and so on. 

If you see that your grandparents are interested, or have questions, discuss what you know with them. However, never allow it to become an argument, or upset them, as they are your grandparents. 

In any case, always do dua for yourself, your parents, your grandparents, your siblings and everyone else, that God showers them with His compassion and Mercy. Ask the Almighty to enlighten your hearts, and ask Him for guidance. 

You can also do tawassul to Ahlul Bayt (a.s.), to give you the strength you need, and introduce them to Ahlul Bayt (a.s.), in a positive manner. You dont know what the outcome will be, but at least they will think positive of your religion, and understand you more. 

With prayers for your success.