Hi, thanks for your question. Just a bit more information required to fully assist you:
-Are you married to each other?
-How old are the children?
Thank you for confirming. The risk you have is that, despite not being married and the kids not being yours, if you are assuming financial responsibility for them and assisting with housing in this way and in the future decide to rescind on this, she may have grounds to pursue an application against you under the Children Act to continue to provide housing for the benefit of the children until they reach a certain age, after which the property will return to you.
It will also obviously depend on what, if any, court orders are made in respect of the children - such as if you both become special guardians.
I hope this assists you. If you found this information helpful please provide a positive rating using the stars at the top of this page. I will not be credited for your question without a positive rating. Thank you.