Firstly, urinating before engaging into sexual intercourse may be the key to achieve climax while dispelling any doubt arising and being sure that it is nothing but ejaculation.
Stimulating the clitoris helps, too. If a woman feels that she has to urinate and pushes with the muscles of her vagina, ejaculation is very likely to happen.
Those couples who experience the female ejaculation brag about it. An orgasm combined with female ejaculation is one of the most intense feelings that a woman can experience.