Is it sex?

Hey guys, so someone I know is adimitly denying that it was sex, and she was unprotected all three times- which I'm trying to get her to know that it is sex and she should wear protection. 
So - her and her boyfriend "put it in", penis in vagina. she is saying it wasn't sex because even though they did put it in they didn't actually do anything else... So what do you guys think? Sex or not?
Her boyfriend totally agrees with me and thinks it sex as well.

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors