I wanna but at the same time dont

I wanna tell my cousin I’m taking fertility medication and there is a good chance it could work since I had a hsg done two months ago so it really could work even better I even had a chemical pregnancy last month and now this month I have femara and my cousin just found out and I would love to tell her there might be a good chance we could be pregnant together but I know she has been trying even longer then me so I dont wanna take her thunder away since even I have been trying for 4 years in may so I wanna let her have her moment but also wanna be like hey we could possibly experience this together. She is almost like a sister because she lived with us when her mom died for 2 almost 3 years and we even shared a room during that point