Is it a red flag if your girlfriend doesn’t let you stay in her house?

my gf lives in an other country with her mom, i will visit her and she always books a room i do not come to her home.today i asked about it and we had a fight she said we have to have a normal relationship with no fights for me to let you in.. then i said so you had that with your ex? she said:well we necer fought.is she hiding me from her mom or?