Vasectomy or lies

My friend has been with a guy for 3 years now 1st year she had a pregnancy scare an he said it couldn't be his cause he had a vasectomy but used the pull out method but now present day he ejaculates inside of her an insists on her staying on her bc I think he's lying to her but she just will not hear it she wants a baby so bad an I think it's just that he don't an she needs to confront the situation