Should I let my ex bring his girlfriend to see our child in my home?

[Maggie]

we have a visit coming up and he will be bringing his girlfriend. should i be bothered by that or just be happy he actually wants to see our child its been a while since he was involved and this is going to be the first real visit. I dont want to be that way and say no she cant come then maybe he wont want to see him...should i care? i wouldnt want him or her to think i wanted him back if i said no she cant come. I guess its just a bit wierd when we are all together....any advice