So guys I had sex

So guys last night I was having sex with my girlfriend and after one session we were ready for another and once I had turned her on with my masterous fingerplay I proceeded to thrust my PENIS into her VAGINA and I barely could get it in because, altough she was very wet, her pussy had already gotten so fucking tight that I was like OMG WTF man? so /lounge/ I just wanna ask you guys if it is normal for a vagina to get that tight just after some fingerlingus?