Darn!..Got to give it another try to post a second photo..It appears that I can only post one pic per comment.

Paradiseprincess, this is quite common in white and light coloured flowers. (Eg: yellows) To put it simply, it is just part of the original pink DNA coming through in the flower. There is nothing you can do to stop this from happening, and there is nothing wrong with your plant. Some “whites” are more pure and never show a pink tinge and others do. They can look very pretty when you have multiple flowers open at once....it’s like having two different coloured flowers on one plant :)

At least with fuchsias the turn to pink is sometimes exacerbated by heat/sunlight. I think it is acid metabolic products developing in the flower as it ages, You might try moving the plant to shade when the blooms start. would be interesting to see what happens.

Charles is right. Heat and sunlight brings this out more, but unfortunately moving to shade doesn’t stop it from happening. In my experience, they are either pure whites (stable) or whites that develop some pink. Your flower is beautiful both ways :)