wtffff Man

My twin sister is pregnant again! So my husband and I have been trying end of well over 2 years. I thought this was going to be our month until I woke up this morning and AF was looking me in my face. My sister has been complaining about not feeling week.. but thought it was just her getting sick. But why she just send me a snap of a positive test. She has an 8 year old and 5 year old foster son. I want to be happy for her but all I can do is cry!