New foster question

Hi guys

Sorry for the direct question but here goes:

We got a lovely new foster American bulldog and she is so sweet and loving. But when me and my gf want to have sexy time she doesn’t let us.

She cries and attempts to get on the bed and get involved.

It looks like she thinks we’re playing and it excites her. We live in a studio so there is no option to put her in a separate room. Is this normal?