My step daughter, her husband and baby have formed a support bubble with my step daughters mum and 17 year old daughter. All fine.
17 year old daughter lives with us half the time. We are a 3 adult household (not including 17 yr old).
Step daughter is insistent that we are part of the support bubble and perfectly ok for us to be in each other's houses (we are all in mid tier) and touch each other etc.
The alternative is the situation where 17 year old can hold the baby etc in our house but we can't.
Can someone please confirm what is the correct thing to do here.