Me [M] has FWB that wants me to creampie her but she’s never had on before – I also have been saving up for a week

I haven’t ejaculated in a week and safe to say my balls are absolutely full to the maximum load. My FWB has never had a creampie before and I am scared that I’ll unload everything and she’ll be dripping for days, because there is A LOT built up.

I’m scared that the whole mess might put her off creampies entirely afterwards?