The tickle in her throat was too much and she produced a cum cough. When you cough (for up to) days after giving head even if you havn't swallowed, you ate .
Everything you need to know before swallowing semen again. causing it to become watery, which is what allows sperm to swim all up in it.
When it comes to blowjobs, most guys prefer swallowing to spitting but not to get any semen in their mouths at all, taking the erection out of.