It's very possible she was a virgin when she had sex, yes. Some women don't bleed or have any pain when they have sex for the first time. It all depends on the woman and the partner they're with. If they're stressed, rushing, or nervous (or if their partner is any of these three) they may be injured during sex, which is what causes the pain and the bleeding.
Hello,
It is not mandatory that bleeding during first time intercourse will be present. The hymen may be damaged by intercourse,playing sports, using tampons, pelvic examinations or even straddle injuries.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.