If I got a lesbian pregnant does that make me gay?
Nope. Well, unless you wear assless chaps at our Pride parades while throwing colourful bead neclaces at the people who are watching the parade. Mind you, there are straight men who wear assless chaps as a way to spice up their intimacy moments with their wife or GFs. So, that one is not so easy to decode.
Yet, and if you want to be, you can be designated as an extended parent or guardian. Or, you can choose to not be a part of the family except as a friend or ally. Lots of ways to look at that experience.