Yes, what you are seeing is completely normal and is nothing to be concerned over. Bugs do not change the colours of the pistils, heat may, but colour change is an indicator of ageing and/or can also signify pollination.
Your plant has progressed beautifully since your last question, however, I can not find in your diary what you are feeding her, but would suggest easing up a bit for a while, the leaves are super green and at this stage in her life, nitrogen requirements are declining. Otherwise, nothing out of the ordinary is happening with your plant.
Hope this helps,..........
Organoman.